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Re: Mammals preying on giant azhdarchid pterosaurs!
On Sun, 21 May 2000, Brian M McCarthy wrote:
> Both physically and behaviorally I can see survival strategies at work.
I'm not arguing this.
> >>Those new animals were sudden additions; if they had evolved on the
> islands, the prey would have evolved behaviors to get away from their
> Pollyanna might agree. But the fossil record is filled with creatures which
> could not evolve strategies to counter certain predator strategies. They
> are extinct.<
> Not mechanistic, indeed. You're right, purposeful innovation is essential
> for animals to survive. Aren't you agreeing with the point you're
> attempting to counter?
I'm certainly not arguing that organisms don't evolve strategies for
survival! I'm only saying that not all strategies have a place in all
ecologies. Specifically, I'm claiming that the strategy of obligatory
nest defense is no longer viable (given modern predators), except in the
semi-aquatic niche (crocs).