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Re: Campbell's even crazier than a MANIAC? (archeopteryx climbing)



----- Original Message -----
From: "don ohmes" <d_ohmes@yahoo.com>
Sent: Saturday, September 20, 2008 10:35 PM

5 ft does not seem enough of a vertical drop to stimulate the initial transition from a cursorial predatory biped that utilizes isolated trees for roosting/nest/perch-hunting to the same, only w/ an initial parachuting/gliding capacity. Could we change that to 5m? :D.

Maybe not. Some say the vegetation on the islands where Archie apparently lived was only 3 m high.


Such a structure it definitely *could*
have used as a lookout and "perch" (except it
would really stand atop the fronds/leaves, not perch on
branches).

As well as a roost or nest site...

However, nesting in trees does not appear to be plesiomorphic even for crown-group birds.


Works especially well in an area where trees are well-scattered, and there is little undergrowth.

There may have been _only_ undergrowth.