[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Bird reduce their "heating bills" in cold climates

On Sat, Jul 3rd, 2010 at 1:27 PM, GUY LEAHY <xrciseguy@q.com> wrote:

> It may be impossible to tell, since climate gradients were generally less in 
> the Mesozoic, but I
> wonder if polar theropods might show the 
> same trend...
> http://www.sciencedaily.com/releases/2010/06/100623104428.htm

Qantassaurus is certainly thought to have had a fore-shortened snout (although 
obviously not a 

However with non-avian dinosaurs, I'd think the length and thickness of the 
tail would have been 
more important as far as heat loss in a cold climate was concerned. During the 
last Friends of 
Dinosaur Dreaming meeting late last year it was hinted that Leaellynasaura may 
have had a hyper-
long tail (the full-scale drawing held up - with the help of several people - 
had to be seen to be 
believed!). I find it hard however to reconcile possible burrowing behaviour 
with such long tails - 
unless Leaellynasaura had a flexible fluffy tail like that of arctic foxes to 
help it brave cold 
conditions, and burrowing was left to other small ornithopod species like 


Dann Pigdon
Spatial Data Analyst               Australian Dinosaurs
Melbourne, Australia               http://home.alphalink.com.au/~dannj