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On the surface of the water they swim low with just the head and neck exposed. All species have lobed toes, and are excellent swimmers and divers. The feet are always large, with broad lobes on the toes and small webs connecting the front three toes. The hind toe also has a small lobe as well. The claws are similar to nails and are flat.
The span between precocial and altricial species is particularly broad in the biology of birds. Precocial birds hatch with their eyes open and are covered with downy feathers that are soon replaced by adult-type feathers. [17] Birds of this kind can also swim and run much sooner after hatching than altricial young, such as songbirds. [17]
The refuge also administers the Shiawassee Management District which coordinates wetland restorations in 22 counties and oversees conservation easements in 44 counties of lower Michigan. The refuge is authorized to expand its present boundaries by 7,500 acres (30 km 2 ) along the Tittabawassee, Shiawassee, and Cass rivers from willing sellers.
Loons are aquatic birds the size of a large duck, to which they are unrelated. Their plumage is largely gray or black, and they have spear-shaped bills. Loons swim well and fly adequately, but are almost hopeless on land, because their legs are placed towards the rear of the body. Four species have been recorded in Michigan. Common loon, Gavia ...
World Aquatics Championships (50 m pool, open water), pool since 1973, open water since 1991 [3] [5] World Swimming Championships (25 m pool), since 1993, for example 2021 FINA World Swimming Championships (25 m) [3] World Open Water Championships, 2000 to 2010, for example 2002 FINA World Open Water Swimming Championships
[37] [44] Incubation is begun as soon as the first egg is laid, so they hatch asynchronously. If a clutch is lost (to predation or flooding, for example) before the young hatch, the red-throated loon usually lays a second clutch, generally in a new nest. [45] The young birds are precocial: upon hatching, they are downy and mobile, with open ...
The European Anglophone name "diver" comes from the bird's habit of catching fish by swimming calmly along the surface and then abruptly plunging into the water. The North American name "loon" likely comes from either the Old English word lumme , meaning lummox or awkward person, or the Scandinavian word lum meaning lame or clumsy.
Open water swimming is a swimming discipline which takes place in outdoor bodies of water such as open oceans, lakes, and rivers. Competitive open water swimming is governed by the International Swimming Federation, World Aquatics (formerly known as FINA), except when it is part of multi-sport events , which are governed by the World Triathlon .