Re: pterosaur femora sprawl

[Dann Pigdon <dannj@alphalink.com.au>]

David Marjanovic writes: 

> I forgot to mention that gibbons walk bipedally in the rare cases when 
> they actually walk, and that orang-utans have recently been found to 
> behave similarly. 

As far as I know, the only orang ever observed to knuckle walk was a heavily 
overweight invdividual in a zoo (and it was more of a shuffle than a true 
walk anyway). This was back in the early 1990s so other examples may have 
since been observed, but they'd still be the exceptions rather than the 
rule. Orangs typically have little choice but to walk bipedally on their 
rare trips to the ground. 

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Dann Pigdon
GIS / Archaeologist              http://geo_cities.com/dannsdinosaurs
Melbourne, Australia             http://heretichides.soffiles.com
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