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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (1538)	2/23/2007 9:24:49 PM
From: TigerPaw	Read Replies (1) \| Respond to of 69300

The first bird didn't have birds as ancestors either. The first bird did have an ancestor with lots of bird-like characteristics. Probably feathers for warmth and stuff like that. It's also a mistake to think that some non bird suddenly became a bird in one generation. It's much more likely that some reptile with feathers for warmth found it could fall out of a tree and survive if it held it's arms out to catch the wind. More of those that got knocked out of trees and survived but the ones that could glide a bit survived even better, and so the competition progressed until finally one could actually fly. The children of that first flyer might not have been able to fly. They might have just been the good gliders like most of their aunts and uncles, but they were close and some of their relatives also got copies of the genes that let them become a full blown flyer until the gene was common enough that it became a real advantage to some bird tribes. In this sense there were many "first birds" since the trait would hang on the margins until there was a critical mass of breeding pairs. TP