A flamingo's plumage is a distinctive pink color with black flight feathers along the edges of the wings. It has a slender body and very long legs, a long, flexible neck and a small head. The flamingo's bill has a characteristic downward bend.
Compared with its long legs, a flamingo's feet are relatively small. The front three toes are webbed, and the back toe is either tiny or missing altogether. Flamingos walk easily and can run when threatened.
The American flamingo is one of the largest species of flamingo. An average adult is 5 feet (1.5 meters) tall and weighs 4-8 pounds (1.8-3.6 kilograms).
American, or Caribbean, flamingos are distributed throughout the Caribbean Islands and along the northern coast of South America. They usually live in the shallows of salt or brackish water or alkaline lakes.
Breeding displays occur in large groups with, at times, thousands of individuals opening their wings or lifting up and turning their heads in one vast, synchronized movement. Theses group displays seem to bring all the birds of the colony to the same readiness to mate, to ensure rapid, synchronized egg laying as soon as conditions allow.
These flamingos eat algae, small seeds and aquatic invertebrates such as brine, fly larvae, shrimp and mollusks. Flamingos usually feed while wading in shallows, using their feet to stir up mud on the bottom. They put their head to the surface (so that the bill is upside-down, with the tip pointing backward) and sweeps their head from side to side.
By a rapid action of the tongue, they pump water in and out of the slightly opened bill. The way in which the upper and lower parts of the bill fit together, combined with the comb-like plates on the bill's edges, make it a useful tool for sieving food from water.
Flamingos are very social birds with some flocks numbering in the thousands.
While flamingos are an abundant bird species, they are threatened by habitat loss due to mineral mining and human disturbance. About 80,000-90,000 American flamingos, concentrated in four major breeding colonies, remain in the wild.