Mammals . Greater Yellowlegs. There are approximately 1.3 million named species of animals, but we don’t really know how many are yet to be discovered. The anatomy of bird legs and feet is diverse, encompassing many accommodations to perform a wide variety of functions.. Home Adaptations Feet Wading: Wading: Greater yellowlegs: Some water birds do not swim through the water; rather they wade through shallow water. Spotted Greenshank 29-32 cm; 136-158 g; wingspan 55 cm. Greater yellowlegs have a beautiful, subtly upswept bill, while lesser yellowlegs have a straight bill, darker and sharper-looking. These birds typically have long, slender legs which allow them to walk slowly and effortlessly through the water without getting their feathers wet. Animal Adaptations There is a tremendous diversity among the world’s animals, and they live nearly everywhere, from high above the tree line to hydrothermal vents at the bottom of the sea. Aquatic Insect ID – Watch a video, learn about and ID some of the insects that live in wetland ponds. Cranes, Herons, and Sandpipers are all examples of wading birds. The bills of greater yellowlegs are about 1.5 times the length of their head, more robust, and are slightly upturned. Scurrying Around; Insects. Bats. They can also be distinguished by their call: 1 to 3 (usually 2) low notes in lesser yellowlegs, 3 to 4 higher, more resonant notes in Adaptations – Watch the Bird adaptations video and decide – Why the long legs and beak? Mystery Shorebird ID. Lesser yellowlegs are overall smaller than greater yellowlegs by up to 30% and their bill is slender and about the same length as the head. Beak Adaptations; Bird Adaptations. Commonly seen feeding among herons and egrets, the bird is well-known for its tendency to comically dash after small fish. Some of the lower bones of the foot (the distals and most of the metatarsal) are fused to form the tarsometatarsus – a third segment of the leg, specific to birds. Heavily built Tringa; dark brown upperparts with whitish spots and fringes; head and neck densely spotted and streaked dark brown Although Greater Yellowlegs (pictured) are more solitary than most shorebirds, they tend to migrate in small flocks as they head for the bogs and coniferous forests of northern Canada and southern Alaska. Most birds are classified as digitigrade animals, meaning they walk on their toes, rather than the entire foot. Greater yellow legs usually prey on fish, sometimes also taking frogs, insects, crabs, or snails.