• The Hearing of Birds

    21 days ago - By Ornithology

    Cooper's Hawk listening
    Birds' songs and calls are important for survival. The ear of a bird is very much like that of a mammal's with two important exceptions. The external ear lacks a pinna although owls have one, and nstead of three vibration-transmitting bones birds have only one, the columella. When sound waves hit the eardrum they are transmitted to the columella and then the cochlea, the fluid-filled organ that contains hair cell nerve endings. The hair cells move in the cochlear fluid and transmit information to the brain. Unlike us, whose hearing declines with age and exposure to...
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