Did early birds exterminate giant insects?
They may have. A recent study indicates that about 600 million years ago, there were insects several feet long. These massive insects had the luxury of high oxygen levels. Also, at that time there were no such things as birds, and so the insects had no predators. However, about 300 million years ago, when birds came on the seen, the massive insects rapidly died out, and only small ones remained. Birds were more agile and strong than the insects were.
I found this article to be extremely interesting. I've always been interested in the dinosaurs and what live was like long ago. In fact, I never even knew that insects every existed that were so huge! This article was written very well, and it was written easy enough for me to understand.
http://www.foxnews.com/scitech/2012/06/05/did-early-birds-exterminate-giant-insects/
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