be_map1512 Kig 'Yar
Number of posts : 104 Age : 32 Registration date : 2011-01-04
| Subject: Birds of prey are birds that hunt for food primarily on the Mon Mar 07, 2011 12:39 am | |
| Birds of prey are birds that hunt for food primarily on the wing, using their keen senses, especially vision. They are defined as birds that primarily hunt vertebrates, including other birds. Their talons and beaks tend to be relatively large, powerful and adapted for tearing and/or piercing flesh. In most cases, the females are considerably larger than the males. The term "raptor" is derived from the Latin word rapere (meaning to seize or take by force) and may refer informally to all birds of prey, or specifically to the diurnal group.[1] Because of their predatory lifestyle, often at the top of the food chain, they face distinct conservation concerns. IBM 4000 PRINTERKeyrings Blog | |
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heroisthai Unngoy
Number of posts : 88 Age : 33 Registration date : 2011-01-21
| Subject: Re: Birds of prey are birds that hunt for food primarily on the Mon Mar 07, 2011 4:32 am | |
| Flight feathers are the long, stiff, asymmetrically shaped, but symmetrically paired feathers on the wings or tail of a bird; those on the wings are called remiges (singular remex) while those on the tail are called rectrices (singular rectrix). Their primary function is to aid in the generation of both thrust and lift, thereby enabling flight. The flight feathers of some birds have evolved to perform additional functions, generally associated with territorial displays, courtship rituals or feeding methods. In some species, these feathers have developed into long showy plumes used in visual courtship displays, while in others they create a sound during display flights. Tiny serrations on the leading edge of their remiges help owls to fly silently (and therefore hunt more successfully), while the extra-stiff rectrices of woodpeckers help them to brace against tree trunks as they hammer. Even flightless birds still retain flight feathers, though sometimes in radically modified forms. Chinese SEOFort Lauderdale CPA | |
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