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Re: erect posture and its implications
---"D.I.G." <firstname.lastname@example.org> wrote:
> While it may be stretching "terrestrial" to its very limits, modern
> birds like swallows or robins (not ducks?) are migrating insectivores.
> Do they, in fact, fit the "high metabolism" model?
It's beyond stretching. These birds are not terrestrial.
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