Орнитофауна Северной Америки
Kaufman K. Kaufman Field Guide to Birds of North America
Справочник- формат pdf
- размер 85.03 МБ
- добавлен 09 июня 2011 г.
Houghton Mifflin Harcourt, 2005. - 343 pages. World-renowned birder Kenn Kaufman addresses a long-running paradox of bird field guides with his Focus Guide. While beginning birdwatchers prefer photographic guides like those by Donald Stokes, the physical traits that make identification easier are more readily discerned in the idealized paintings of illustrative guides like those by Roger Tory Peterson and National Geographic. Kaufman's groundbre...
Williamson S.L. A Field Guide to Hummingbirds of North America
Справочник- формат pdf
- размер 49.82 МБ
- добавлен 08 июня 2011 г.
Houghton Mifflin Harcourt, 2002. - 232 pages. Besides being objects of wonder, hummingbirds, says Sheri L. Williamson in the Peterson Field Guide: Hummingbirds of North America, are unique to the New World, range in size from the smallest warm-blooded animal (Cuba's Bee Hummingbird) to outsizing songbirds (South America's Giant Hummingbird), can fly backwards and side to side, and still defy category among ornithological types. The habits, habit...