[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
On Wed, Apr 25, 2001 at 01:01:05PM -0400, Dinogeorge@aol.com scripsit:
> In a message dated 4/25/01 11:45:05 AM EST,
> firstname.lastname@example.org writes:
> > Either way, the wingstroke was co-opted from the predatory stroke.
> Nope. The predatory stroke was co-opted from the wingstroke. Where
> am I wrong?
1) whenever the first bird evolved, the wing stroke had to be
initially exapted from something; if that *isn't* a predatory grasping
stroke, what was it?
2) what part of a full, four phase wing beat *can* be co-opted as a
grasping predatory stroke? The adaptations for flight more or less
force full extension of wings when used at or near full power; geese,
frex, do threat displays without fully extending their wings but when
they're trying to hit you with them have to fully extend them to
generate any power.
To maintain the end is to uphold the means.