Description[ edit ] The American oystercatcher has distinctive black and white plumage and a long, bright orange beak. The head and breast are black and the back, wings and tail greyish-black. The underparts are white, as are feathers on the inner part of the wing which become visible during flight. The irises are yellow and the eyes have orange orbital rings.
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Glossary Atlantic Ocean the body of water between Africa, Europe, the southern ocean above 60 degrees south latitude , and the western hemisphere. It is the second largest ocean in the world after the Pacific Ocean. Nearctic living in the Nearctic biogeographic province, the northern part of the New World.
This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico. Neotropical living in the southern part of the New World. In other words, Central and South America. Pacific Ocean body of water between the southern ocean above 60 degrees south latitude , Australia, Asia, and the western hemisphere.
For example: animals with bright red or yellow coloration are often toxic or distasteful. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a now extinct synapsid ancestor; the fossil record does not distinguish these possibilities.
Convergent in birds. Iteroparous animals must, by definition, survive over multiple seasons or periodic condition changes.
Description[ edit ] The different species of oystercatcher show little variation in shape or appearance. The variable oystercatcher is slightly exceptional in being either all-black or pied. They are large, obvious, and noisy plover -like birds , with massive long orange or red bills used for smashing or prying open molluscs. The bill shape varies between species, according to the diet.
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