American Avocet

Scientific Name: Recurvirostra americana

Family: Stilts and Avocets

Description: The American Avocet can be found around lakeshores and tidal flats, especially in the wide-open spaces of the west, flocks of elegant American Avocets wade in the shallows. They often feed while leaning forward, with the tips of their bills in the water and slightly open, filtering tiny food items from just below the surface. Sometimes a flock will feed this way in unison, walking forward, swinging their heads rhythmically from side to side.

Habitat: Beaches, flats, shallow lakes, prairie ponds. Widespread on shallow waters and extensive mudflats, both along coast and in the interior. Typically in very open situations, with little vegetation. Inland, often favors salty or alkaline lakes more than fresh waters.

Feeding Behavior: Forages in a variety of ways. Often sweeps head from side to side, with upturned tip of bill barely submerged in shallow water, finding food by touch. Also finds food visually, picking items from surface of water or mud, or plunging head into water; sometimes snatches flying insects as they pass.

Diet: Mostly small crustaceans and insects, also some seeds. Feeds on abundant tiny creatures that live in or near shallow water. Diet includes many midge larvae and other aquatic insects, small crustaceans. On lakes in west may feed heavily on brine shrimp and brine flies.

Eggs: 4, sometimes 3-5. Olive-buff, blotched with brown and black. Incubation is by both parents, 23-25 days. Female incubates at night, both sexes take turns during day. Young: Downy young leave nest soon after hatching, find all their own food. Both parents tend young. Age at first flight about 4-5 weeks.

Nesting: Typically nests in loose colonies, sometimes mixed with Black-necked Stilts. If predators approach a colony on foot, several adults may perform a distraction display nearby, running about in a crouch with both wings spread. If eggs or young are directly threatened, adult avocets may fly straight at an intruder, calling loudly. Nest site is on bare open ground, not far from water. Nest (built by both sexes) may be a simple scrape in soil, or scrape lined with pebbles and other debris, or a mound built up to more than a foot tall.

Young: Downy young leave nest soon after hatching, find all their own food. Both parents tend young. Age at first flight about 4-5 weeks.

Conservation Status: Population probably stable or possibly increasing. Numbers occurring in east (as migrants and wintering birds) have increased greatly during recent decades. Undoubtedly vulnerable to the effects of climate change, which are likely to cause major changes to western wetlands.

Notes: Images captured near Rockport, TX

ATTRIBUTION: All of the bird images in this post are copyrighted and are the exclusive property of Terry B. Kahler. Reproduction without explicit written consent is prohibited. Some of the information contained in this section was taken from the National Audubon Society website and is being used under their terms of use. Redistribution from this site is prohibited.


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