[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
RE: Campbell's even crazier than a MANIAC? (archeopteryx climbing)
Sim Kining wrote:
> An eagle's talons are highly specialized for predation, so are the claws of
> large cats, neither seem to
> have a problem climbing around or perching in trees.
Neither of these has claws *as* specialized as the sickle claw (and its
supporting digit) of dromaeosaurids. Not even seriemas (cariamas).
Yeah sure, maybe the sickle-claw of dromaeosaurids was used for climbing,
branch-grasping, etc. But it clearly didn't evolve for this purpose. It
sounds like a counsel of despair to argue that the sickle-claw was an arboreal
tool - especially when there's no elongated, reversed hallux on the other side
of the foot.
Get more out of the Web. Learn 10 hidden secrets of Windows Live.