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Re: COMPETING BATS, BIRDS & PTEROSAURS
On Tue, 6 Feb 2001 firstname.lastname@example.org wrote:
> Pterosaurs and birds probably didn't compete directly, but as
> pterosaur lineages died out, their ecological roles may have been
> occupied by birds.
I'm not sure how one would go about estimating the level of
competition--or predation, by birds. I would think there would be great
competition for nest sites, prey, etc.
> So-called competitive replacement is probably rare
> (see Benton 1996).
I'll check it out.
> These observations imply that birds outcompete diurnal bats when the
> two coexist... maybe this is because bat flight apparatus is more fragile
> than feathers or, more reasonably, that bats are inherently constrained
> by their thermoregulatory abilities (bats overheat quicker in sunlight
> and cool quicker in cold air than birds - obviously because of their
> largely naked patagia). Could the same have been at all true of
Also, carrying bat baby on board would be a constraint in an airborne