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Re: erect posture and its implications

On Fri, 19 Jun 1998, Human wrote:

> I vaguely imagined that it would be advantageous for herbivores to follow
> their migrating food source (that's why they migrate as far as I know;
> seasonal changes force them to follow vegetation so you can say their food
> is always "migrating" away from them...

Freedom from predation at nesting grounds is also a prime "reason" for
migration of many birds.  Of course they still must eat.