A South American hummingbird’s noise is well above the normal hearing range of most birds, perhaps to stand out amid the din of other species in its habitat.
DOUGLAS QUENQUA, NY Times: Science
Mon, 03/05/2018 - 2:47pm
A South American hummingbird’s noise is well above the normal hearing range of most birds, perhaps to stand out amid the din of other species in its habitat.