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Re: Walking dromaeosaurs

Aspidel wrote:

This morning I was watching _Motacilla alba_ walking: this bird moves its
neck front-and-back all the time when walking and moves its tail up-and-down
to keep its balance.

In birds the front-and-beck neck movement (and associated head bobbing) is connected with digestion isn't it? Specifically, the mechanical breakdown of food in the gizzard. Our modern day feathered friends do not have teeth, so they "chew" their food in the gizzard.


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