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Topic: Handbook of the Birds of the World

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	Articles - Bird flight (Site not responding. Last check: 2007-10-11)
		There are three major forces that impede a bird´s aerial flight: frictional drag (caused by the friction of air and body surfaces), form drag (due to frontal area of the bird, also known as pressure drag) and lift-induced drag (caused by the wingtip vortices).
		The bird skeleton is hollow to reduce weight, and many unnecessary bones have been lost (such as the bony tail of the early bird Archaeopteryx), along with the toothed jaw of early birds, which has been replaced with a lightweight beak.
		Handbook of Birds of the World Vol 1.
	www.bird-center.net /articles/Bird_flight (1590 words)

	List of birds - Wikipedia, the free encyclopedia
		This page lists living orders and families of birds, class Aves (for extinct birds, please see Extinct birds and Prehistoric birds).
		This article and the descendant family articles follow the taxonomy of the Handbook of Australian, New Zealand and Antarctic Birds (HANZAB) for families largely endemic to that region, and otherwise the Handbook of Birds of the World (HBW).
		The flightless and mostly giant Struthioniformes lack a keeled sternum and are collectively known as ratites.
	en.wikipedia.org /wiki/List_of_birds (240 words)

	Encyclopedia Of Birds - Encyclopedia Shop (Site not responding. Last check: 2007-10-11)
		… Birds are member of the class of vertebrates containing animals with feathers.
		Comprehensive coverage of all the bird families of the world; Spectacular photography of birds in their natural habitats …
		The Handbook of the Birds of the World (HBW) is the first work ever to illustrate and deal in detail with all the species of birds in the world.
	www.ecaseload.com /encyclopedia-of-birds.html (385 words)

	Ramphastidae (Toucans, Toucanets, & Aracaris)
		The hole is just large enough for a single bird to pass in and out of and is often placed under a branch to shelter from direct inclement weather.
		Toucans are easily recognized birds with their over-sized and often colorful bill which allows them to pluck fruit from vegetation as well as drink water from the crevices of trees.
		Immature birds are sooty fl with less maroon tipping and the red and white colors are more muted.
	www.nashvillezoo.org.moses.com /piciformes/ramphastidae.htm (4090 words)

	Biological Sciences Subject Guide
		Handbook of the Birds of the World - Ref QL673.H26
		Endangered Birds of the World - Ref QL676.7 K56 1981
		Distribution and Taxonomy of the Birds of the World
	library.queensu.ca /webeng/guides/biology/biol_ref.htm (318 words)

	Lynx Edicions (Site not responding. Last check: 2007-10-11)
		The best catalogue of books from specialised publishers.
		The first work ever to illustrate and deal in detail with all the species of birds in the world.
		A free library of videos of the world's birds.
	www.hbw.com /links (46 words)

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