What bird has the best eyesight?

The eye of a bird is larger compared to the size of the animal than for any other group of animals, although much of it is concealed in its skull. The ostrich has the largest eye of any land vertebrate, with an axial length of 50 mm (2 in), twice that of the human eye. Bird eye size is broadly related to body mass. read more

Eagles, in general, have the best eyesight. An eagle has an angle of vision of about 300 degrees, and can magnify any given image up to 8 times. They can scan an area of 30,000 hectares from 4,500 feet up in the air. read more

Yeah, that acts as a dish, focusing the sound and giving them what may be the best directional hearing in the world. read more