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Re: Feathers vs. tryosseus cannal



In a message dated 95-10-16 08:32:26 EDT, NINO@vm1.sdi.uam.es (Nino) writes:

>There is other problem. Why you suposse that the birds without a tryosseus
>cann
>al couldn't flight actively? Ok, they couldn't flight as well as those whose
>ha
>ve it, but probably they could flight well enough to move around.

Absolutely right. The canal and the associated shift of the m.
supracoracoideus is an evolutionary improvement to a pre-existing volant
ability.