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Nest size (was RE: Brooding rex? (was Feathers for T. rex))
> From: firstname.lastname@example.org [mailto:email@example.com]On Behalf Of
> Ken Kinman
> Should probably be more careful what you aim your torpedoes at. I'm
> not saying there are any hard and fast rules.
> However, raptorial birds like hawks, eagles, and owls, usually have
> clutches of 2-4 eggs. Many common prey species (like grouse, ducks,
> pheasants, etc.) have larger clutches more like 5-15 eggs (or
> more). I see
> no reason that trends among early coelurosaurs (predators vs. prey) would
> have been much different (but again there would be exceptions to such
Something for consideration:
IF Galloanserae is monophyletic and near the base of Neognathae, the larger
clutch size in grouse, ducks, pheasants, etc. may be symplesiomorphy rather
than ecomorphology (or rather eco-behavior). That is, the smaller clutch
size of owls, falconiforms (and sea birds and hummers and what have you)
relative to galliforms and anseriforms MIGHT be a synapomorphy of dervied
NOTE: The above is pure speculation. It would require more work at mapping
out clutch size onto a number of different alternative phylogenies.
Furthermore, I have no idea of the clutch size of tinamous, which might be
useful to know!
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796