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Birds are divided into eight main visual categories:
(1) swimmers - ducks and ducklike birds
(2)
aerialists - gulls and gulllike birds
(3) long-legged waders - herons and cranes
(4) smaller waders - plover and sandpipers
(5) fowllike birds - grouse and quail
(6)
birds of prey - hawks, eagles, and owls
(7) passerine (perching) birds
(8) nonpasserine land birds |
