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98-529: The Detroit River International Wildlife Refuge consists primarily of coastal wetlands , several islands in the Detroit River , and waterfront parks. The refuge includes islands, marshes , shoals, and waterfront lands along 48 miles (77 km) of the Detroit River and Western Lake Erie shoreline. It also includes Humbug Marsh , a wetland in southeastern Wayne County , which is classified as

196-711: A sink or a source of carbon, depending on the specific wetland. If they function as a carbon sink, they can help with climate change mitigation . However, wetlands can also be a significant source of methane emissions due to anaerobic decomposition of soaked detritus , and some are also emitters of nitrous oxide . Humans are disturbing and damaging wetlands in many ways, including oil and gas extraction , building infrastructure, overgrazing of livestock , overfishing , alteration of wetlands including dredging and draining, nutrient pollution , and water pollution . Wetlands are more threatened by environmental degradation than any other ecosystem on Earth, according to

294-528: A wetland of international importance . Much of the land surrounding the Detroit River is urbanized and, in some places, heavily industrialized. This has resulted in excessive water pollution from the unregulated dumping of chemicals and industrial waste for many decades. Much of the garbage and sewage from Detroit's rapid industrialization found its way into the river. Much of the Detroit River and its shoreline were heavily polluted and unsafe for recreational use. Large quantities of this pollution collected around

392-436: A 6.8 kg (15 lb) mule deer fawn. However, a few eagles may target prey considerably heavier than themselves; such prey is too heavy to fly with, thus it is either eaten at the site of the kill or taken in pieces back to a perch or nest. Golden and crowned eagles have killed ungulates weighing up to 30 kg (66 lb) and a martial eagle even killed a 37 kg (82 lb) duiker , 7–8 times heavier than

490-459: A close genetic relationship with Haliastur and Milvus ; the whole group is only distantly related to the Buteo group. Fish eagles exist in every continent throughout the world, except for South America. Although fish eagles can be found in many different places around the world, they have been classified as "Near Threatened". Reasons such as overfishing, pollution, habitat destruction, and

588-402: A frequency and duration to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally included swamps, marshes, bogs, and similar areas.' For each of these definitions and others, regardless of the purpose, hydrology is emphasized (shallow waters, water-logged soils). The soil characteristics and

686-473: A large part of their diets, either fresh or as carrion. Proposed subfamily Haliaeetinae. Genera: Haliaeetus , Icthyophaga . Some authors include Gypohierax angolensis , the "vulturine fish eagle" (also called the palm-nut vulture ) in this group. However, genetic analyses indicate it is related to a grouping of Neophron – Gypaetus – Eutriorchis ( Egyptian vulture , bearded vulture (lammergeier), and Madagascar serpent eagle ). The fish eagles have

784-401: A massive conservation effort aimed at cleaning up the Detroit River. For years before, conservation efforts were halted by the enormous multimillion-dollar cost of removing pollutants from the river. In addition to that, industries, which had significant political influence, detested the regulations necessary to lessen the amount of pollutants in the river. The Wyandotte National Wildlife Refuge

882-424: A natural group but denote essentially any kind of bird of prey large enough to hunt sizeable (about 50 cm long or more overall) vertebrates . The word "eagle" is borrowed into English from Anglo-Norman : eagle and Middle French : aigle , both derived ultimately from Latin : aquila ("eagle"). It is cognate with terms such as French : aigle , Portuguese : águia and Spanish : águila . It

980-1259: A polar climate, wetland temperatures can be as low as −50 °C (−58 °F). Peatlands in arctic and subarctic regions insulate the permafrost , thus delaying or preventing its thawing during summer, as well as inducing its formation. The amount of precipitation a wetland receives varies widely according to its area. Wetlands in Wales , Scotland , and western Ireland typically receive about 1,500 mm (59 in) per year. In some places in Southeast Asia , where heavy rains occur, they can receive up to 10,000 mm (390 in). In some drier regions, wetlands exist where as little as 180 mm (7.1 in) precipitation occurs each year. Temporal variation: Surface flow may occur in some segments, with subsurface flow in other segments. Wetlands vary widely due to local and regional differences in topography , hydrology , vegetation , and other factors, including human involvement. Other important factors include fertility, natural disturbance, competition, herbivory , burial and salinity. When peat accumulates, bogs and fens arise. The most important factor producing wetlands

1078-540: A portion of the overall water cycle, which also includes atmospheric water (precipitation) and groundwater . Many wetlands are directly linked to groundwater and they can be a crucial regulator of both the quantity and quality of water found below the ground. Wetlands that have permeable substrates like limestone or occur in areas with highly variable and fluctuating water tables have especially important roles in groundwater replenishment or water recharge. Substrates that are porous allow water to filter down through

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1176-403: A protective barrier to coastal shoreline. Mangroves stabilize the coastal zone from the interior and will migrate with the shoreline to remain adjacent to the boundary of the water. The main conservation benefit these systems have against storms and storm surges is the ability to reduce the speed and height of waves and floodwaters. Eagle See text Eagle is the common name for

1274-422: A strong influence on wetland water chemistry, particularly in coastal wetlands and in arid and semiarid regions with large precipitation deficits. Natural salinity is regulated by interactions between ground and surface water, which may be influenced by human activity. Carbon is the major nutrient cycled within wetlands. Most nutrients, such as sulfur , phosphorus , carbon , and nitrogen are found within

1372-410: A unique kind of wetland where lush plant growth and slow decay of dead plants (under anoxic conditions) results in organic peat accumulating; bogs, fens, and mires are different names for peatlands. Variations of names for wetland systems: Some wetlands have localized names unique to a region such as the prairie potholes of North America's northern plain, pocosins , Carolina bays and baygalls of

1470-515: A wetland is "an ecosystem that arises when inundation by water produces soils dominated by anaerobic and aerobic processes, which, in turn, forces the biota, particularly rooted plants, to adapt to flooding". Sometimes a precise legal definition of a wetland is required. The definition used for regulation by the United States government is: 'The term "wetlands" means those areas that are inundated or saturated by surface or ground water at

1568-422: A wetland system includes its plants ( flora ) and animals ( fauna ) and microbes (bacteria, fungi). The most important factor is the wetland's duration of flooding. Other important factors include fertility and salinity of the water or soils. The chemistry of water flowing into wetlands depends on the source of water, the geological material that it flows through and the nutrients discharged from organic matter in

1666-403: A wetland) affects hydro-periods (temporal fluctuations in water levels) by controlling the water balance and water storage within a wetland. Landscape characteristics control wetland hydrology and water chemistry. The O 2 and CO 2 concentrations of water depend upon temperature , atmospheric pressure and mixing with the air (from winds or water flows). Water chemistry within wetlands

1764-558: A whole. To replace these wetland ecosystem services , enormous amounts of money would need to be spent on water purification plants, dams, levees, and other hard infrastructure, and many of the services are impossible to replace. Floodplains and closed-depression wetlands can provide the functions of storage reservoirs and flood protection. The wetland system of floodplains is formed from major rivers downstream from their headwaters . "The floodplains of major rivers act as natural storage reservoirs, enabling excess water to spread out over

1862-594: A wide area, which reduces its depth and speed. Wetlands close to the headwaters of streams and rivers can slow down rainwater runoff and spring snowmelt so that it does not run straight off the land into water courses. This can help prevent sudden, damaging floods downstream." Notable river systems that produce wide floodplains include the Nile River , the Niger river inland delta, the Zambezi River flood plain,

1960-697: Is after all a two-edged sword. All hawks seem to have this habit, from the smallest kestrel to the largest Ferruginous – but not the Eagles. Among the eagles are some of the largest birds of prey: only the condors and some of the Old World vultures are markedly larger. It is regularly debated which should be considered the largest species of eagle. They could be measured variously in total length, body mass, or wingspan. Different lifestyle needs among various eagles result in variable measurements from species to species. For example, many forest-dwelling eagles, including

2058-616: Is also often used in Christian iconography to represent the Gospel of John , and eagle-shaped lecterns are common in Anglican and some Roman Catholic churches . The eagle was believed to be able to look directly into the sun in the same way that the Gospel of John looks directly at Jesus' divinity, and the great distances the eagle flies represent the spread of the gospel to the ends of

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2156-467: Is broadly synonymous with the less common English term "erne" or "earn", deriving from Middle English : ern , from Old English : earn , in which it acts as the usual word for the bird. The Old English term is turn derived from Proto-Germanic : * arnuz and is cognate with other synonymous words in Germanic languages such as Swedish : örn , German : Aar and Gothic : ara . Through

2254-718: Is comparable in size to a common buzzard ( Buteo buteo ) or red-tailed hawk ( B. jamaicensis ), have relatively longer and more evenly broad wings, and more direct, faster flight, despite the reduced size of their aerodynamic feathers. Most eagles are larger than any other raptors , apart from some vultures . The smallest species of eagle is the Great Nicobar serpent eagle ( Spilornis klossi ), at 450 g (1 lb) and 40 cm (16 in). The largest species are discussed below. Like all birds of prey, eagles have very large hooked beaks for ripping flesh from their prey, strong, muscular legs, and powerful talons . The beak

2352-440: Is determined by the pH , salinity , nutrients, conductivity , soil composition, hardness , and the sources of water. Water chemistry varies across landscapes and climatic regions. Wetlands are generally minerotrophic (waters contain dissolved materials from soils) with the exception of ombrotrophic bogs that are fed only by water from precipitation. Because bogs receive most of their water from precipitation and humidity from

2450-633: Is either freshwater , brackish or saltwater . The main types of wetland are defined based on the dominant plants and the source of the water. For example, marshes are wetlands dominated by emergent herbaceous vegetation such as reeds , cattails and sedges . Swamps are dominated by woody vegetation such as trees and shrubs (although reed swamps in Europe are dominated by reeds, not trees). Mangrove forest are wetlands with mangroves , halophytic woody plants that have evolved to tolerate salty water . Examples of wetlands classified by

2548-412: Is hydrology, or flooding . The duration of flooding or prolonged soil saturation by groundwater determines whether the resulting wetland has aquatic, marsh or swamp vegetation . Other important factors include soil fertility, natural disturbance, competition, herbivory , burial, and salinity. When peat from dead plants accumulates, bogs and fens develop. Wetland hydrology is associated with

2646-451: Is the only place in the world where both crocodiles and alligators coexist. The saltwater crocodile inhabits estuaries and mangroves. Snapping turtles also inhabit wetlands. Birds , particularly waterfowl and waders use wetlands extensively. Mammals of wetlands include numerous small and medium-sized species such as voles , bats , muskrats and platypus in addition to large herbivorous and apex predator species such as

2744-401: Is typically heavier than that of most other birds of prey. Eagles' eyes are extremely powerful. It is estimated that the wedge-tailed eagle has a visual acuity twice that of a typical human. This acuity enables eagles to spot potential prey from a very long distance. This keen eyesight is primarily attributed to their extremely large pupils which ensure minimal diffraction (scattering) of

2842-545: Is usually saturated with water". More precisely, wetlands are areas where "water covers the soil , or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season". A patch of land that develops pools of water after a rain storm would not necessarily be considered a "wetland", even though the land is wet. Wetlands have unique characteristics: they are generally distinguished from other water bodies or landforms based on their water level and on

2940-524: The Department of the Interior has approved of future land acquisitions by the U.S. Fish and Wildlife Service totaling 18.75 square miles (48.56 km) of land and water. Expanding the territory through land acquisitions is a top priority for the refuge. The expansion of the refuge is limited due to finances and the fact that most areas within the proposed range are privately owned. Most of

3038-535: The Detroit River or Lake Erie are officially included into the refuge. All properties and potential future land acquisition sites are within the United States and governed by the U.S. Fish and Wildlife Service. While the boundaries of the Detroit River International Wildlife Refuge encompass only 7.88 square miles (20.42 km) of property scattered along the west coast of the Detroit River and Lake Erie ,

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3136-781: The Holy Roman Empire . The eagle of the Holy Roman Empire was two-headed, supposedly representing the two divisions, East and West , of the old Roman Empire. This motif, derived from the Byzantine (Eastern Roman) Empire was also adopted by the Russian Empire and is still featured in the Flag of Albania . The Roman eagle was preceded by the eagle of Ptolemaic Egypt and the Achaemenid Empire . In

3234-505: The Millennium Ecosystem Assessment from 2005. Methods exist for assessing wetland ecological health . These methods have contributed to wetland conservation by raising public awareness of the functions that wetlands can provide. Since 1971, work under an international treaty seeks to identify and protect " wetlands of international importance ." A simplified definition of wetland is "an area of land that

3332-688: The Pantanal in South America, and the Sundarbans in the Ganges - Brahmaputra delta. Wetlands contribute many ecosystem services that benefit people. These include for example water purification , stabilization of shorelines, storm protection and flood control . In addition, wetlands also process and condense carbon (in processes called carbon fixation and sequestration ), and other nutrients and water pollutants . Wetlands can act as

3430-485: The Proto-Indo-European root, it is further related to words such as Greek : ὄρνις ("bird") and Lithuanian : erelis ("eagle"). Although "erne" can be used to refer to any eagle, it is most commonly used for the golden eagle or sea-eagle. Eagles are large, powerfully-built birds of prey , with heavy heads and beaks. Even the smallest eagles, such as the booted eagle ( Hieraaetus pennatus ), which

3528-716: The U.S. Fish and Wildlife Service stuck a cooperative agreement with DTE Energy to include portions of their properties into the refuge, including the Lagoona Beach Unit and Brancheau Unit of the Enrico Fermi Nuclear Generating Station . This was the refuge's first expansion into Monroe County along the coast of Lake Erie. Other areas in Lake Erie extending as far south as the Michigan–Ohio border were eventually included into

3626-444: The atmosphere , their water usually has low mineral ionic composition. In contrast, wetlands fed by groundwater or tides have a higher concentration of dissolved nutrients and minerals. Fen peatlands receive water both from precipitation and ground water in varying amounts so their water chemistry ranges from acidic with low levels of dissolved minerals to alkaline with high accumulation of calcium and magnesium . Salinity has

3724-576: The beavers , coypu , swamp rabbit , Florida panther , jaguar , and moose . Wetlands attract many mammals due to abundant seeds, berries, and other vegetation as food for herbivores, as well as abundant populations of invertebrates, small reptiles and amphibians as prey for predators. Invertebrates of wetlands include aquatic insects such as dragonflies , aquatic bugs and beetles , midges, mosquitos , crustaceans such as crabs, crayfish, shrimps, microcrustaceans, mollusks like clams, mussels, snails and worms. Invertebrates comprise more than half of

3822-429: The buteonine black-chested buzzard-eagle of South America, may assume the position of top raptorial predator in open areas. Many other eagles, including the species-rich genus Spizaetus , live predominantly in woodlands and forests. These eagles often target various arboreal or ground-dwelling mammals and birds, which are often unsuspectingly ambushed in such dense, knotty environments. Hunting techniques differ among

3920-674: The golden eagle , bald eagle , and other birds of prey in the family of the Accipitridae . Eagles belong to several groups of genera , some of which are closely related. True eagles comprise the genus Aquila . Most of the 68 species of eagles are from Eurasia and Africa . Outside this area, just 14 species can be found—two in North America , nine in Central and South America , and three in Australia . Eagles are not

4018-607: The soils . Wetlands form a transitional zone between waterbodies and dry lands , and are different from other terrestrial or aquatic ecosystems due to their vegetation 's roots having adapted to oxygen-poor waterlogged soils . They are considered among the most biologically diverse of all ecosystems, serving as habitats to a wide range of aquatic and semi-aquatic plants and animals , with often improved water quality due to plant removal of excess nutrients such as nitrates and phosphorus . Wetlands exist on every continent , except Antarctica . The water in wetlands

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4116-543: The Detroit River International Wildlife Refuge include the large Fighting Island , which has already undergone major recovery after serving as an industrial dumping ground for decades, Grass Island , Turkey Island , Crystal Island , and Bois Blanc Island . Wetland A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water , either permanently, for years or decades, or only seasonally. Flooding results in oxygen -poor ( anoxic ) processes taking place, especially in

4214-540: The Detroit River International Wildlife Refuge. Many of these lands were through cooperative management acquisitions, where the property would be included into the refuge but not owned directly by the U.S. Fish and Wildlife Service. In 2004, the refuge grew to include Humbug Marsh , which is in Gibraltar and Trenton and also includes Humbug Island . At the same time, the refuge acquired the U.S. Army Corps of Engineers Strong Unit just north of Estral Beach . In 2005,

4312-609: The Detroit River. At its inception, the Detroit River International Wildlife Refuge included only areas that were part of the former Wyandotte National Wildlife Refuge. This included only 304 acres (123 hectares) surrounding Grassy Island and Mamajuda Island just north of Grosse Ile in the Detroit River. Soon after, Mud Island just north of Grassy Island was donated to the refuge by the National Steel Corporation . The refuge continued to expand through land acquisitions to include Calf Island in 2002. In 2003,

4410-480: The Iberian Peninsula. Booted eagles or "true eagles" have feathered tarsi (lower legs). Tribe Aquililae or proposed subfamily Aquilinae. Genera: Aquila , Hieraaetus ; Spizaetus , Oroaetus , Spizastur ; Nisaetus ; Ictinaetus , Lophoaetus ; Polemaetus ; and Stephanoaetus . See comments under eagle species for changes to the composition of these genera. Most snake or serpent eagles, as

4508-639: The Okavango River inland delta, the Kafue River flood plain, the Lake Bangweulu flood plain (Africa), Mississippi River (US), Amazon River (South America), Yangtze River (China), Danube River (Central Europe) and Murray-Darling River (Australia). Groundwater replenishment can be achieved for example by marsh , swamp , and subterranean karst and cave hydrological systems. The surface water visibly seen in wetlands only represents

4606-522: The Southeastern US, mallines of Argentina, Mediterranean seasonal ponds of Europe and California, turloughs of Ireland, billabongs of Australia, among many others. Wetlands are found throughout the world in different climates. Temperatures vary greatly depending on the location of the wetland. Many of the world's wetlands are in the temperate zones , midway between the North or South Poles and

4704-502: The US, the best known classifications are the Cowardin classification system and the hydrogeomorphic (HGM) classification system. The Cowardin system includes five main types of wetlands: marine (ocean-associated), estuarine (mixed ocean- and river-associated), riverine (within river channels), lacustrine (lake-associated) and palustrine (inland nontidal habitats). Peatlands are

4802-610: The United States' commercial fish and shellfish stocks depend solely on estuaries to survive. Amphibians such as frogs and salamanders need both terrestrial and aquatic habitats in which to reproduce and feed. Because amphibians often inhabit depressional wetlands like prairie potholes and Carolina bays, the connectivity among these isolated wetlands is an important control of regional populations. While tadpoles feed on algae, adult frogs forage on insects. Frogs are sometimes used as an indicator of ecosystem health because their thin skin permits absorption of nutrients and toxins from

4900-643: The acquisition of the Erie Marsh in 2006, the refuge doubled its size to include the southern wetlands of Erie Township near the Ohio border, including Gard Island in the North Maumee Bay Archeological District . This was a major milestone for the Detroit River International Wildlife Refuge. The refuge grew from its original 304 acres (123 hectares) in 2001 to 5,047 acres (2,042 hectares) by 2007. The last of these acquisitions

4998-424: The area include lake whitefish , sturgeon , salmon , perch , and walleye . Numerous mammal species also occupy the coastline throughout the refuge. The area serves as a vital migratory route and resting place for countless species of birds. Over 30 species of waterfowl , 17 species of raptors , 31 species of shorebirds , 160 species of songbirds , and 117 species of fish live along or regularly migrate through

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5096-606: The authorized boundaries of the Refuge are several existing parks including Elizabeth Park, Sterling State Park , Lake Erie Metropark, as well as Pointe Mouillee State Game Area and Erie State Game Area. The headquarters of the Detroit River International Wildlife Refuge are in Grosse Ile Township , which is not officially listed as part of the refuge. In Canada, the Detroit River International Wildlife Refuge does not have any formal boundaries, and no Canadian portions of

5194-436: The bird exhibits generalist feeding behavior, which means it does not hunt down specific types of snakes but rather feeds on them depending on their availability in the wild. Harpy eagles or "giant forest eagles" are large eagles that inhabit tropical forests. The group contains two to six species, depending on the author. Although these birds occupy similar niches and have traditionally been grouped, they are not all related:

5292-520: The bird is derived from Latin : aquila by way of French : aigle . The origin of aquila is unknown, but it is believed to possibly derive from aquilus (meaning dark-colored, swarthy, or blackish) as a reference to the plumage of eagles. Old English used the term earn , related to Scandinavia's ørn / örn . It is similar to other Indo-European terms for "bird" or "eagle", including Greek : ὄρνις ( ornís ), Russian : орёл ( orël ), and Welsh : eryr . In

5390-455: The coat of arms of Kotka , Finland, the eagle is depicted carrying an anchor and the caduceus on its feet. Heraldic eagles are most often found displayed , i.e. with their wings and legs extended. They can also occur close , i.e. with their wings folded, or rising , i.e. about to take flight. The heads, wings, and legs of eagles can also be found independently. Eagles symbolize strength, courage, and independence and are commonly found in

5488-622: The eagle Zeus bearing Ganymede aloft, from Classical times up to the present (see illustrations in the Ganymede (mythology) page.) Eagles appear metaphorically in many translations of the Old Testament . God is spoken of as carrying Israel on "eagles' wings" in Exodus 19:4, Isaiah 40:31 compares those who wait on the Lord to flying eagles, and Psalm 103 mentions renewing one's youth "as

5586-558: The eagle and often depicted eagles in their art. The golden eagle was sacred to the Aztec god Huitzilopochtli while the harpy eagle was sacred to Quetzalcoatl . Eagles are an exceptionally common symbol in heraldry, being considered the "King of Birds" in contrast to the lion , the "King of Beasts". Whereas the lion (e.g. England) usually represents authority, the eagle is the symbol of power. They are particularly popular in Germanic countries such as Austria, due to their association with

5684-462: The eagle was able to look directly at the sun, and that they forced their fledglings to do the same. Those that blinked would be cast from the nest. This belief persisted until the Medieval era . The eagle is the patron animal of the ancient Greek god Zeus . In particular, Zeus was said to have taken the form of an eagle in order to abduct Ganymede , and there are numerous artistic depictions of

5782-579: The eagle". In explaining this rejuvenation, Augustine of Hippo says in his commentary on the Psalms that eagles' beaks overgrow as they age and that they break them against rocks to restore them. The translation, however, is uncertain: the word in the Hebrew, נשר , can also be translated vulture , and is listed alongside specific kinds of vulture in Leviticus ' discussion of unclean animals . The eagle

5880-454: The earth. The United States eagle feather law stipulates that only individuals of certifiable Native American ancestry enrolled in a federally recognized tribe are legally authorized to obtain eagle feathers for religious or spiritual reasons. In Canada, the poaching of eagle feathers for the booming U.S. market has sometimes resulted in the arrests of First Nations person for the crime. The Moche people of ancient Peru worshiped

5978-472: The environment around the river. The recent cleaning up and restoration of the Detroit River is remarkable, although other problems are still at hand. Today, many species of native animals—some endangered species —are returning to the area after being driven out by human development. The Detroit River is home to a growing number of bird species, such as eagles (including reintroduced bald eagles ), ospreys , and peregrine falcons . Fish species in abundance in

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6076-634: The equator. In these zones, summers are warm and winters are cold, but temperatures are not extreme. In subtropical zone wetlands, such as along the Gulf of Mexico , average temperatures might be 11 °C (52 °F). Wetlands in the tropics are subjected to much higher temperatures for a large portion of the year. Temperatures for wetlands on the Arabian Peninsula can exceed 50 °C (122 °F) and these habitats would therefore be subject to rapid evaporation. In northeastern Siberia , which has

6174-576: The figures listed are the median reported for each measurement in the guide Raptors of the World in which only measurements that could be personally verified by the authors were listed. The eagles are generally distributed in all types of habitats and nearly all parts of the world. The birds can be found in northern tundra to tropical rainforests and deserts. In North America, bald eagles and golden eagles are very common. Eagles are often informally divided into four groups. The snake eagles are placed in

6272-504: The following areas: According to the Ramsar Convention: The economic worth of the ecosystem services provided to society by intact, naturally functioning wetlands is frequently much greater than the perceived benefits of converting them to 'more valuable' intensive land use – particularly as the profits from unsustainable use often go to relatively few individuals or corporations, rather than being shared by society as

6370-437: The heraldry of many nations across the world. Albania, Andorra, Armenia, Austria, Dagestan, Egypt, Germany, Ghana, Iraq, Jordan, Kazakhstan, Mexico, Montenegro, Nigeria, Philippines, Poland, Palestine, Panama, Russia, Romania, Serbia, South Sudan, Somaliland, the United States of America, Yemen, Zambia, and Zimbabwe are the nations whose coats of arms feature an eagle. The eagle's continuing significance and worldwide appeal as

6468-406: The incoming light. Like most diurnal raptors, eagles have little ability to see ultraviolet light. The female of all known species of eagles is larger than the male. Eagles normally build their nests, called eyries , in tall trees or on high cliffs. Many species lay two eggs, but the older, larger chick frequently kills its younger sibling once it has hatched. The parents take no action to stop

6566-468: The interface between truly terrestrial ecosystems and aquatic systems, making them inherently different from each other, yet highly dependent on both." In environmental decision-making, there are subsets of definitions that are agreed upon to make regulatory and policy decisions. Under the Ramsar international wetland conservation treaty , wetlands are defined as follows: An ecological definition of

6664-415: The killing. It is said that eagles fly above clouds but this is not true. Eagles fly during storms and glide from the wind's pressure. This saves the bird's energy. Due to the size and power of many eagle species, they are ranked at the top of the food chain as apex predators in the avian world. The type of prey varies by genus. The Haliaeetus and Icthyophaga eagles prefer to capture fish, though

6762-462: The known animal species in wetlands, and are considered the primary food web link between plants and higher animals (such as fish and birds). Depending on a wetland's geographic and topographic location, the functions it performs can support multiple ecosystem services , values, or benefits. United Nations Millennium Ecosystem Assessment and Ramsar Convention described wetlands as a whole to be of biosphere significance and societal importance in

6860-419: The land within the Detroit River International Wildlife Refuge is jointly operated by individual landowners and the federal government. The expansion could also include areas of significant permanent populations, such as the islands of Grosse Ile Township , the riverfronts of several Downriver communities, Berlin and Frenchtown charter townships, and Monroe . The proposed range stretches for 48 miles from

6958-458: The mouth of the Detroit River at Lake Erie . The pollutants were so high after the spring thaw that thousands of migrating birds were killed by oil slicks and contaminated water every year. Oxygen levels in the river were depleted to the point where fish were unable to inhabit its waters. Because much of this pollution drained into and affected Lake Erie, portions of the lake itself were considered "dead" and unable to support aquatic life. Swimming in

7056-465: The name suggests, primarily prey on snakes. Despite filling the niche of a snake eagle, genetic studies suggest that the Madagascar serpent eagle ( Eutriorchis ) is not related to them. Over several decades, a great deal of research has been done on the  Snake-eagle's diet, which is mainly made up of reptiles, especially snakes. When it comes to catching snakes, it is generally accepted that

7154-781: The plants and animals controlled by the wetland hydrology are often additional components of the definitions. Wetlands can be tidal (inundated by tides) or non-tidal. The water in wetlands is either freshwater , brackish , saline , or alkaline . There are four main kinds of wetlands – marsh , swamp , bog , and fen (bogs and fens being types of peatlands or mires ). Some experts also recognize wet meadows and aquatic ecosystems as additional wetland types. Sub-types include mangrove forests , carrs , pocosins , floodplains , peatlands, vernal pools , sinks , and many others. The following three groups are used within Australia to classify wetland by type: Marine and coastal zone wetlands, inland wetlands and human-made wetlands. In

7252-447: The preying eagle. Authors on birds David Allen Sibley , Pete Dunne , and Clay Sutton described the behavioral difference between hunting eagles and other birds of prey thus (in this case the bald and golden eagles as compared to other North American raptors): They have at least one singular characteristic. It has been observed that most birds of prey look back over their shoulders before striking prey (or shortly thereafter); predation

7350-730: The refuge acquired joint management over the 243-acre (98 ha) Eagle Island Marsh in Monroe, Michigan . This land is at the mouth of the River Raisin in between the Monroe Power Plant and Sterling State Park . This section, which was once very polluted, is owned by Automotive Components Holdings and is the location of a large Ford factory. In 2006, the refuge grew to include the 780-acre (315 ha) Lake Erie Metropark in Brownstown Charter Township . With

7448-535: The river. However, there was little support from Detroit businesses toward cleaning up the river, because it would negatively affect Detroit's industrialism and economy. In 1970, the entire fishing industry in the St. Clair River , Lake St. Clair , the Detroit River , and Lake Erie had to be temporarily closed due to toxic levels of mercury found in the water. This caused the fishing industry and all those related to lose substantial amounts of money. This, in turn, spurred

7546-429: The soil and underlying rock into aquifers which are the source of much of the world's drinking water . Wetlands can also act as recharge areas when the surrounding water table is low and as a discharge zone when it is high. Mangroves , coral reefs , salt marsh can help with shoreline stabilization and storm protection. Tidal and inter-tidal wetland systems protect and stabilize coastal zones. Coral reefs provide

7644-537: The soil of wetlands. Anaerobic and aerobic respiration in the soil influences the nutrient cycling of carbon, hydrogen, oxygen, and nitrogen, and the solubility of phosphorus thus contributing to the chemical variations in its water. Wetlands with low pH and saline conductivity may reflect the presence of acid sulfates and wetlands with average salinity levels can be heavily influenced by calcium or magnesium. Biogeochemical processes in wetlands are determined by soils with low redox potential. The life forms of

7742-412: The soils and plants at higher elevations. Plants and animals may vary within a wetland seasonally or in response to flood regimes. There are four main groups of hydrophytes that are found in wetland systems throughout the world. Submerged wetland vegetation can grow in saline and fresh-water conditions. Some species have underwater flowers, while others have long stems to allow the flowers to reach

7840-494: The solitary eagles are related to the black hawks and the Philippine eagle to the snake eagles. Major new research into eagle taxonomy suggests that the important genera Aquila and Hieraaetus are not composed of nearest relatives, and it is likely that a reclassification of these genera will soon take place, with some species being moved to Lophaetus or Ictinaetus . Family Accipitridae The modern English term for

7938-530: The sources of water include tidal wetlands , where the water source is ocean tides ); estuaries , water source is mixed tidal and river waters; floodplains , water source is excess water from overflowed rivers or lakes; and bogs and vernal ponds , water source is rainfall or meltwater . The world's largest wetlands include the Amazon River basin , the West Siberian Plain ,

8036-401: The southern border of Detroit at Zug Island in the city of River Rouge south all the way to the Michigan–Ohio border. The expansion would not include any areas within the city limits of Detroit. Potential areas within this realm include Zug Island , Grosse Ile , Elizabeth Park , Pointe Mouillee State Game Area , Sterling State Park , and Turtle Island . Potential Canadian additions to

8134-418: The southern part of Finland , near the Gulf of Finland , is the town of Kotka , which literally means "eagle", while the town of L'Aquila in the central part of Italy literally means "the eagle". In Britain before 1678, eagle referred specifically to the golden eagle , with the other native species, the white-tailed eagle , being known as erne . The modern name "golden eagle" for aquila chrysaetos

8232-406: The spatial and temporal dispersion, flow, and physio-chemical attributes of surface and ground waters. Sources of hydrological flows into wetlands are predominantly precipitation , surface water (saltwater or freshwater), and groundwater. Water flows out of wetlands by evapotranspiration , surface flows and tides , and subsurface water outflow. Hydrodynamics (the movement of water through and from

8330-403: The species and genera, with some individual eagles having engaged in quite varied techniques based on their environment and prey at any given time. Most eagles grab prey without landing and take flight with it, so the prey can be carried to a perch and torn apart. The bald eagle is noted for having flown with the heaviest load verified to be carried by any flying bird, since one eagle flew with

8428-528: The species in the former often capture various animals, especially other water birds , and are powerful kleptoparasites of other birds. The snake and serpent eagles of the genera Circaetus , Terathopius , and Spilornis predominantly prey on the great diversity of snakes found in the tropics of Africa and Asia. The eagles of the genus Aquila are often the top birds of prey in open habitats, taking almost any medium-sized vertebrate they can catch. Where Aquila eagles are absent, other eagles, such as

8526-472: The subfamily Circaetinae . The fish eagles, booted eagles, and harpy eagles have traditionally been placed in the subfamily Buteoninae together with the buzzard-hawks (buteonine hawks) and harriers. Some authors may treat these groups as tribes of the Buteoninae; Lerner & Mindell proposed separating the eagle groups into their own subfamilies of Accipitridae . Sea eagles or fish eagles take fish as

8624-719: The surface of the water. When trees and shrubs comprise much of the plant cover in saturated soils, those areas in most cases are called swamps . The upland boundary of swamps is determined partly by water levels. This can be affected by dams Some swamps can be dominated by a single species, such as silver maple swamps around the Great Lakes . Others, like those of the Amazon basin , have large numbers of different tree species. Other examples include cypress ( Taxodium ) and mangrove swamps. Many species of fish are highly dependent on wetland ecosystems. Seventy-five percent of

8722-496: The surface. Submerged species provide a food source for native fauna, habitat for invertebrates, and also possess filtration capabilities. Examples include seagrasses and eelgrass . Floating water plants or floating vegetation are usually small, like those in the Lemnoideae subfamily (duckweeds). Emergent vegetation like the cattails ( Typha spp.), sedges ( Carex spp.) and arrow arum ( Peltandra virginica ) rise above

8820-464: The surrounding environment resulting in increased extinction rates in unfavorable and polluted environmental conditions. Reptiles such as snakes , lizards , turtles , alligators and crocodiles are common in wetlands of some regions. In freshwater wetlands of the Southeastern US, alligators are common and a freshwater species of crocodile occurs in South Florida. The Florida Everglades

8918-440: The types of plants that live within them. Specifically, wetlands are characterized as having a water table that stands at or near the land surface for a long enough period each year to support aquatic plants . A more concise definition is a community composed of hydric soil and hydrophytes . Wetlands have also been described as ecotones , providing a transition between dry land and water bodies. Wetlands exist "...at

9016-667: The use of pesticides have contributed to the species' rapid population drop. The booted eagle is a group of eagle that typically migrates across the Sahara Desert to Europe. It usually reaches Europe around the beginning of March and leaves by the end of September. It's interesting to note that these types of eagles usually mate with the same partner and return to the same areas years later. Female booted eagles usually lay 1-4 eggs, which promptly hatch after 37 to 40 days. Researchers estimate that there are between 3600 and 6900 pairs of booted eagles in Europe, which are mostly situated in

9114-456: The very large harpy eagle , have relatively short wingspans, a feature necessary for being able to maneuver in quick, short bursts through densely forested habitats. Eagles in the genus Aquila , found almost exclusively in open country, are noted for their ability to soar, and have relatively long wings for their size. These lists of the top five eagles are based on weight, length, and wingspan, respectively. Unless otherwise noted by reference,

9212-518: The water or consuming any of its remaining fish were considered health risks. In 1961, the Wyandotte National Wildlife Refuge was founded by congressional order thanks in part to Michigan politician John Lesinski, Jr. , who was Michigan's 16th congressional district representative from 1951 to 1965. The refuge paved the way for tighter restrictions on industries and allocated much needed government funding to clean up

9310-518: Was an area referred to as Howard Fix at 65 acres (26 hectares). It is near the Enrico Fermi Nuclear Generating Station, but little has been published about this property. The Refuge also owns the shoals around these islands and has entered into cooperative agreements with the U.S. Army Corps of Engineers and Detroit Edison , a local electricity company, to manage hundreds of acres of habitat on Lake Erie. Within

9408-586: Was introduced by the naturalist John Ray . The village of Eagle in Lincolnshire , England , has nothing to do with the bird; its name is derived from the Old English words for "oak" and "wood" (compare Oakley ). In the ancient Sumerian mythology , the mythical king Etana was said to have been carried into heaven by an eagle. Classical writers such as Lucan and Pliny the Elder claimed that

9506-636: Was officially signed into law as the Detroit River International Wildlife Refuge Establishment Act (H.R. 1230) by President George W. Bush on December 21, 2001. The Congressional Budget Office originally estimated that the creation of the Detroit River International Wildlife Refuge would cost between $ 13–21 million over the first five years, in which the majority of the money spent would be through land acquisitions. Millions of dollars so far have been used for land acquisitions and to improve

9604-445: Was very small though and only occupied the area surrounding Grassy Island , and the refuge's existence could not prevent Grassy Island from becoming highly contaminated from toxic soil dredged from the nearby River Rouge . In 2001, the Wyandotte National Wildlife Refuge was absorbed into the much larger Detroit River International Wildlife Refuge, which was largely advocated by veteran Michigan representative John Dingell . The refuge

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