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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White-throated Needletail
White-throated Needletail: Large swift, gray-brown overall with white throat and undertail. Wings are glossed with green. Tail is short and square, with protruding feather shafts giving a spiked appearance. Very swift flight with several rapid wing beats followed by swooping glides.
White-collared Swift
White-collared Swift: Very large swift, gray-black overall with blue gloss on breast and back. White collar is distinct. Bill, legs and feet are black. The flight is strong and fast. Rapid shallow wing beats followed with long glides. Soars on thermals and updrafts, ranging many miles daily to feed.
White-throated Swift
White-throated Swift: Medium-sized swift, mostly brown-black except for white throat, white patches on belly, flanks, white edges on wings. Face is pale gray, has dark eye patch. May be the most rapid flying North American bird, has been seen fleeing from raptors at estimated speeds of over 200 mph.