do bird visual fields overlap?

[Patrick van der Smagt]

lbarea at waikato.ac.nz writes:

>Some birds do see in sterio,
>Natural selection is likely to have favoured sterio vision

As to why the gannet would not use stereo vision, this reference is
interesting:

	D. N. Lee, The optic flow field: The foundation of vision,
	Phil. Trans. R. Soc. Lond., B 290, pp. 169--179, 1980.

							Patrick