One of the major problems with people in trying to understand arboreality is that the only arboreal animals they are thinking of are like lizards or small five toed animals and that only they could be arboreal. Who are we to say animals like dromaeosaurids couldn’t climb because they couldn’t climb like a lizard? Why?
Look at monkey’s. Do they always hug a tree when they climb? Do they sometimes hold their body away from the trunk and climb?
We have to start opening our minds to other ways of climbing. And it’s not just one thing for flight to have started. It is dozen’s of things that the animal had to change/evolve for flight. Climbing is one of them. Holding the body away from the trunk and climbing is another. Not impossible.
Tracy L. Ford
P. O. Box 1171
Poway Ca 92074