• BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

    Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Tern, Portland, Maine, May 16, 2021 (1 Viewer)


Well-known member

I saw a small flock of these terns in Portland, Maine today (May 16, 2021), in the "Bug Light" area of the river/bay.

My thinking is Common Tern? A large number of these were reported a few days before in the same area.

Thanks in advance,



Well-known member
Is there a clear way to exclude Forster's here? I think the bill shape, extent of black look better for that species.

(Many of the things you'd check like underparts colour, wing colour I think are difficult to assesss in this photo)

[Edit: peterginsburg just pm'd me to point out the dark outer vanes to outer tail feathers. I agree this makes it common tern; Macaulay photos show Forster's has dark inner vanes (when it has dark feathers)]
Last edited:

Users who are viewing this thread