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  • BirdWatching

    The eyes have it

    Oct 13, 2018 4 minutes
    BY ELDON GREIJ

    Vision is the most important sensory system for birds, and it is more highly developed in birds than any other vertebrate, including humans. There are many reasons.

    First, bird eyes are huge in relation to the size of their heads. They are proportionately much larger than human eyes. The eyes of eagles and owls are about the size of human eyes or larger, and the eyes of the Common Ostrich are about twice as large as those of humans. In many bird species, including songbirds, the eyes are about as large as their brains.

    Because bird eyes are so large, they

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