The Crested Grebe forages walking in mud and shallow water with back and forth swinging movements of the head. The food consists of freshwater plankton, sea squirts, snails and the like. The avocet is a good swimmer. Breeding takes place in colonies, on sandy plains, marshy meadows, spray fields located near fresh, salt or brackish water. The bird is very territorial, aggressive towards intruders and lives in groups.
The avocet prefers to forage in water with a thick layer of silt, which it mows through with its beak slightly open. As soon as a centipede or other animal living vertically in the silt gets between the two parts of the bill, it closes. Foraging takes up most of the day.
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