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Re: More on Argentavis




Subject: Re: More on Argentavis


Birds other than hummingbirds do it by means of full alternating momentum reversal. It works for quite large birds as well. You will often see hawks doing it, while hunting over fields.
JimC


----- Original Message ----- From: "evelyn sobielski" <koreke77@yahoo.de>
To: <dinosaur@usc.edu>
Sent: Wednesday, July 04, 2007 3:50 AM
Subject: Re: More on Argentavis



I find it interesting that in the size range of about
3-10 cm, hovering flight seems to have been far easier
to achieve than in larger or smaller animals.
Dragonflies, hawkmoths, hummingbirds, small passerines
(which don't have an adapted shoulder joint but still
manage to hover for some periods of time)...