Whether they’re opening for takeoff, spreading wide for a lazy soar or flapping to brake for landing, bird wings make flying ...

Birds like this mourning dove use oils from preen glands to make their feathers waterproof. Water runs off their wings and doesn’t penetrate ... which is not conducive to flight. Raindrops are ...

A large, pale gray-buff dove with a black collar ... the blackish primaries and the brown wing coverts in flight. The undersides of the wings are pale. The underparts are a paler buff-gray ...

A little larger than the mourning dove; generally brownish ... coverts form prominent patches on the wings, contrasting sharply with the blackish flight feathers; blackish square-ended tail ...