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naked heads (was: Re: Velociraptor Animation)
HP "David Marjanovic" <email@example.com>
> And why doesn't it have feathers on its head?>
HP Tim Williams wrote:
> The correlation for scavenging birds having naked heads and necks is
good: vultures from the Old World (Accipitridae) and New World (Vulturidae /
Cathartidae) show this feature, as does the carrion-eating marabou stork
(Ciconiidae). Thus, bare heads evolved at least twice in the Aves (three
times if it evolved independently in the marabou and its kissing cousins,
the vulturids.) >
So, why not some dromaeosaurs with a naked head and others, like cf.
_Sinornithosaurus_ with a feathered head?
Friendly - Luc J. "Aspidel" BAILLY.