Birds and stereo

[P3D Kirk W. Charles <kirk@xxxxxxxxxxxxxxxxxx>]

Gabriel wrote
> Yes, even humans do it, instinctively. People on wide open spaces, such as
> on mountain ranges, move their heads left and right to try to judge the
> vast distances. This of course is due to motion parallax, as you mention.

This must be why some hyper stereo seems somewhat natural.  That is to say you
get the depth information simmilar as "being there" but in a slightly different
form

> But your comment about the birds, makes me wonder another aspect. If the
> bird's eyes are located on the sides, can they see in stereo. I am thinking
> there might not be any overlap, between the corresponding eyes.

It depends on the species of bird.  Owls have great stereo vision, as do many
birds of prey.  Their eyes are more forwardly placed. Good for hunting!  Many
smaller birds have their eyes located more laterally.  Giving up stereo vision
to gain nearly 360 degree field of view.  Good is someone is hunting you!

Kirk


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