bird vision

[nytecam]

Which bird has the sharpest vision and how does the best compare with human vision and by what factor?

[ron1863]

Hi, I googled the following information, which may help:

The eye is one of the largest parts of a bird's head and can sometimes even weigh more than the bird's brain. According to Birdnote.org the bird's eyes account for about 15 percent of their head's weight. In contrast, a human's eyes account for only about 1 percent of our head's weight.

The eyesight of birds also varies considerably among the many species of birds. Their eyesight is practically customized for their own individual needs. All birds have the fascinating ability to see in what is termed binocular and monocular vision. This simply means birds eyes work together as a pair to see straight ahead, but each eye can also see independently of the other eye. This monocular vision is the reason for the varying placement of the eyes on different bird species.