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Short title: The code of nomenclature and check-list of North American birds adopted by the American Ornithologists' Union; being the report of the Committee of the Union on Classification and Nomenclature
One study found the average rate of injury for birds in mist nets is lower than any other method of studying vertebrates, between 0 and 0.59% while the average mortality rate is between 0 and 0.23%. [1] While rare, it has been suggested (without scientific studies) that larger birds may be more prone to leg injuries and internal bleeding.
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The Birds of America is a book by naturalist and painter John James Audubon, containing illustrations of a wide variety of birds of the United States. It was first published as a series in sections between 1827 and 1838, in Edinburgh and London.
Birds have a number of adaptations which give visual acuity superior to that of other vertebrate groups; a pigeon has been described as "two eyes with wings". [1] Birds are theropods, [2] [3] and the avian eye resembles that of other sauropsids, with ciliary muscles that can change the shape of the lens rapidly and to a greater extent than in ...
The birds roost alone during the non-breeding season but may roost side-by-side during the breeding season, sometimes with the newly fledged juvenile sandwiched between the adults. The roost sites chosen are thin twigs on trees with cover above them and were often close to human habitation and lights.