Very interesting. Always wondered about that. The other type of motion is
the reverse; in which the body moves but the head is stationary.
Here are a couple of 'lucky' photos I took long ago. Bob OBrien
Portland
https://www.flickr.com/photos/159695762 at N07/albums/72177720322848808/


On Sat, Dec 28, 2024 at 11:43 AM Dennis Paulson via Tweeters <
tweeters at u.washington.edu> wrote:


> This explains why chickens and pigeons and coots and other birds bob their

> heads as they walk. They stabilize-move-stabilize-move-stabilize-move the

> head as they walk, while the body keeps a steady forward pace. Presumably

> this is to give them the best vision of their surroundings.

>

> Dennis Paulson

> Seattle

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