Bird Eye Chart
When you are not sure of the size or color of the bird eyes you need see our comprehensive Bird Eye Chart. The Chart covers most North American species.
Here is an even larger reference chart! This chart shows 375 different birds.
Bird eyes function by admitting light through the transparent cornea, lens, and vitreous body. This also stimulates photoreceptors on the retina at the back of the eye. Each retina has at least one fovea. A densely packed concentration of photoreceptors that’s responsible for sharp central vision. These receptors are specialized neurons classically divided into rods and cones. They are named for their shape and adapted to handle the value and color, respectively, of our visual environment. These receptors translate light energy into neural impulses by the differential bleaching of photopigments. Cone cells therefore transduce photons into neural impulses via three classes of photopigments—called photopsins. Consequently each of which absorb a different range of light wavelengths.