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Re: Mammals preying on giant azhdarchid pterosaurs!

On Sat, 20 May 2000, [iso-8859-1] João Simões Lopes Filho wrote:

> If egg-eating mammals destroyed the egg-layers, there would'nt be no species
> of bird now. The monitor lizards would have destroyed the ostriches, the
> Brazilian mustelids would have destroyed the rheas, etc

Ostriches and rhea effectively conceal their nests.  Both live in a
habitat in which grass is an effective concealing medium.  As such, they
have two advantages over the vast majority of dinosaurs at the end of the
Cretaceous: 1) they are smaller and big things are _a priori_ easier to
find; 2) dinosaurs didn't have grass to hide in.