Tips for using Browse:

Browsing is a valuable way to learn about birds, however it is a brute force approach and not designed for identification. A more sophisticated approach to finding a bird with specific field marks is to use the Step by Step Search. You can also try the Wizard to find a bird, which uses a question and answer approach, but again it does not give you the flexibility of the Step by Step Search.

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Thayer's Gull
Thayer's Gull: Having had full species status since 1973, as of 2017, the AOU considers this gull to be a subspecies of the Iceland Gull and has lumped it there. To see this please jump to the Iceland Gull species account. New subspecies range maps for this bird will be available in the next iBird update at which time we will retire the Thayer’s Gull as it’s own species.
Tropical Shearwater
Tropical Shearwater: Small seabird black-brown above, on sides of neck, undertail, and on flight feathers and leading edge of underwing. Underparts, upper sides of rump, and wing linings white. Medium, blue-gray bill with slightly hooked tip. Long, slightly pointed wings. Short, pink-gray legs and webbed feet. Sexes and juvenile similar.
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