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One HOW TO BEGIN BIRD STUDY
Two THE LURE OF MIGRATION WATCHING
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acres adult American Birds average beginner behavior bird banders bird banding bird books bird clubs bird migration bird songs bird students bird study bird watching black-headed gull broad-wings Broley census chimney swift chipping sparrows coast colony color plates counts cycle density ducks eagles eggs England exploration feeding female Fish and Wildlife fledglings flight line flock foraging forest gulls habitats hawks herons Hooded warbler interesting Kittiwake large numbers Linnaean Society Long Island males maps marsh Massachusetts Midtoe migration watching miles Museum naturalists nesting birds North American northern numbers numbers of birds observations Ohio once ornithologists pair period plumage population prairie present recorded Red-eyed vireo Red-wings region reported robins roost Ruffed grouse sandpiper seen singing perches snowy owl song sparrow species starlings study area Table terns territory tion trapping trees warbler watchers Wildlife Service winter woodland woodpecker wren yards York young birds