Bird eyes are larger than any other animal group compared to the size of the animal, but many are hidden in the skull. The ostrich's eye is the largest of the terrestrial vertebrates, with an axial length of 50 mm (2.0 inches), twice that of the human eye. Bird eye size is widely related to body weight.
Which bird has the largest eyes?
Even flightless ostriches have an axial length of 50 mm (2 inches), making them the largest eye of any terrestrial vertebrate (Walls 1942).
Which animal has the largest eyes of all?
The giant squid has the largest eyes in the animal kingdom. People up to 10 inches in diameter often describe it as the size of a supper plate, the size of a human head.
Are the bird's eyes big?
There are many reasons. First, the bird's eyes are huge compared to the size of the head. They are proportionally much larger than the human eye. The eyes of eagles and owls are the same as or larger than the eyes of humans, and the eyes of ostriches are about twice as large as humans.
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