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.

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.

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.

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.

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.