The Crested Tern is a seabird in the tern family, native to Australia, that nests in dense colonies on coastlines and islands.
The adults of both sexes are identical in appearance, with grey upperparts, white underparts, a yellow bill, and a shaggy black crest that recedes in winter. Juveniles have a distinctive appearance, with strongly patterned grey, brown and white plumage, and rely on their parents for food for several months after they have fledged. Like all members of the genus Thalasseus, the Crested Tern feeds by plunge diving for fish, usually in marine environments; the male offers fish to the female as part of the courtship ritual.
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