> From: Jim Nichols <jhnichols@xxxxxxxxxxxxx>
>
> I think that is why the female is larger
Now you got me wondering if this is a general pattern for flying creatures.
In raptors, the female is always bigger. They mate in the air, and the theory
is that females evolved bigger to be able to extricate themselves from a tryst
that is getting too close to the ground. He's focused on a task, and she's
wondering what colour to pain the ceiling. :-)
Songbirds (Passerines) do not mate in the air, and don't have a size disparity.
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temporarily low cost of energy from antiquity. Because the low cost was
temporary, it was an unrealistic basis for a way of life. -- William Catton
<http://www.lmgtfy.com/?q=William+Catton> ::::
:::: Jan Steinman, EcoReality Co-op ::::
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