Tuesday, June 3, 2014

Bird of prey vision

I know this is a wiki article so take the information with a grain of salt but you can verify aspects with a more in depth search if you need to.

http://en.wikipedia.org/wiki/Bird_vision#Movement

High density of receptors and four types of receptors.  The article also discusses the differences in sight (ex retinal structure) between diurnal, nocturnal, and water birds.

I found mixed results on whether hawks were farsighted.  Some sights (not supported by research papers though) said they can refocus much faster than we can.

http://www.kentuckyawake.org/Red-Tailed_Hawk

There was another statement about refocusing when entering water too that was supported by research.

Strod, Arad, Izhaki and Katzir, “Cormorants keep their power: visual resolution in a pursuit-diving bird under amphibious and turbid conditions,” Current Biology, Vol 14, R376-R377, 25 May 2004. 
http://crev.info/2004/05/cormorant_eyes_rapidly_refocus_in_dives_into_murky_water/


No comments: