Arctic tern Sterna paradisaea

Migrant tern that summers in the UK and winters in Antarctica

Habitat: sea, estuaries and freshwater marshes

Summer visitor to UK where it breeds; winters in Antarctica

Pale grey upperparts, white below, short red legs, black cap and blood-red bill

In flight shows translucent wings

Eats fish

Nest is a bare scrape

1 brood May to June; 2 buffy eggs blotched black