This Hummingbird Chirps Like an Insect. Can It Hear Its Own Sound? by DOUGLAS QUENQUA

By DOUGLAS QUENQUA 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. Published: March 4, 2018 at 07:00PM from NYT Science http://nyti.ms/2oRGSGV