Marsh terns

With their aerial acrobatics and crisp plumages, three tern species of the genus Chlidonias are always popular with birders. Josh Jones takes a closer look at their appearance and habits.

IDENTIFICATION

The spring and autumn migration seasons are exciting times to be in the field for patchbirders. Among the commoner migrants on the move are those slightly trickier species which birders always need to target: they are scarce and unpredictable enough...

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