Re: Bird vs. theropod dinosaur tracks/trackways

["Jason Pedersen" <prometheus_79@hotmail.com>]

I am just now getting my mail (70 new messeges), so forgive me if 
this has been answered.


>> 1). Why do birds "waddle" (and thus turn their toes inwards) and 
theropods
>>apparently did not (as manifested by the trackway evidence)? 
>
>A guess: birds have a wider "carriage" due to adaptation for 
perching?

sounds good to me


>> 2). What skeletal or other morphological feature(s) cause a bird 
to walk
>>pigeon-toed and theropods not?

>>the pelvis?

Flying birds also have a much larger breastplate to support the 
muscles needed to sustain flight, thereby widening the body.


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