Foreward, by K. Z. Lorenz.--Tonal quality of bird sounds, by P. Marler.--Experimental studies in the ontogeny of avian vocalizations, by M. Konishi and F. Nottebohm.--Song as a reinforcer, by J. G.

Add Yahoo as a preferred source to see more of our stories on Google. There’s a massive difference between vocal learning bird species and birds that rely on innate calls. You can teach certain birds ...

Birds are the master vocalists of the animal kingdom. They can make a remarkable variety of sounds. But why is a barred owl more of a baritone, while a cedar waxwing is a soprano? And what influences ...

Add Yahoo as a preferred source to see more of our stories on Google. Mountain chickadees are unusual in having more complex calls than songs. Vladimir Pravosudov I approach a flock of mountain ...

Birds’ chirps, trills, and warbles echo through the air, while whales’ boings, “biotwangs,” and whistles vibrate underwater. Despite the variations in sounds and the medium through which they travel, ...

Light pollution is causing birds around the world to sing for longer each day, prolonging their vocalizations on average by 50 minutes, according to a new study by Brent Pease and Neil Gilbert. In ...

I approach a flock of mountain chickadees feasting on pine nuts. A cacophony of sounds, coming from the many different bird species that rely on the Sierra Nevada’s diverse pine cone crop, fill the ...