American avocet

From Wikipedia, the free encyclopedia
  (Redirected from Recurvirostra americana)
Jump to: navigation, search
American avocet
Recurvirostra americana -Palo Alto Baylands-8.jpg
Breeding plumage
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Recurvirostridae
Genus: Recurvirostra
Species: R. americana
Binomial name
Recurvirostra americana
(Gmelin, 1789)
Calls from American avocets in Palo Alto, California

Problems playing this file? See media help.

The American avocet (Recurvirostra americana) is a large wader in the avocet and stilt family, Recurvirostridae.

Description[edit]

This avocet has long, thin, gray legs, giving it its colloquial name, "blue shanks". The plumage is black and white on the back with white on the underbelly. The neck and head are cinnamon colored in the summer and gray in the winter. The long, thin bill is upturned at the end. The adult bird measures 40–51 cm (16–20 in) in length, 68–76 cm (27–30 in) and 275–420 g (9.7–14.8 oz) in weight.[2][3]

Breeding and habits[edit]

The breeding habitat is marshes, beaches, prairie ponds, and shallow lakes in the mid-west as far north as southern Alberta, Saskatchewan, and Manitoba,[2] and on the Pacific coast of North America. American avocets form breeding colonies numbering dozens of pairs. When breeding is over the birds gather in large flocks, sometimes including hundreds of birds. Nesting occurs near water, usually on small islands or boggy shorelines where access by predators is difficult. The female lays four eggs in a saucer-shaped nest, and both sexes take turns incubating them. Upon hatching, the chicks feed themselves; they are never fed by their parents.[4]

This species is migratory, and mostly winters on the southern Atlantic and Pacific coasts of Mexico and the United States.

The American avocet forages in shallow water or on mud flats, often sweeping its bill from side to side in water as it seeks its crustacean and insect prey.[4]

Protected status[edit]

The American avocet is protected under the Migratory Bird Treaty Act of 1918.[5]

Gallery[edit]

References[edit]

  • O'Brien, Michael, et al. (2006). The Shorebird Guide. New York: Houghton Mifflin. ISBN 0-618-43294-9

External links[edit]