Christmas Bird Count
Breeding bird survey, Australian Bird Count, BioBlitz
978-613-7-07964-5
6137079643
60
2011-07-29
29,00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Christmas Bird Count (CBC) is a census of birds in the Western Hemisphere, performed annually in the early Northern-hemisphere winter by volunteer birders. The purpose is to provide population data for use in science, especially conservation biology, though many people participate for recreation. Up through the 19th century, many North Americans participated in the tradition of Christmas "side hunts", in which they competed at how many birds they could kill, regardless of whether they had any use for the carcasses and of whether the birds were beneficial, beautiful, or rare. At the end of that century the U.S. ornithologist Frank Chapman, an officer in the recently formed National Audubon Society, proposed counting birds on Christmas instead of killing them.
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Zoologia
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