Roosters have an internal clock that makes them crow just before dawn, researchers find. ->
The Gunnison sage-grouse courts females by inflating its chest and making a popping sound -- but experts say this unusual U.S. bird is at the brink of extinction. ->
Parrots will trade for a better deal, if presented with a tastier option.
->
Emperor penguins gain body heat using convection from the surrounding air. ->
Some bigger-bodied birds aim to attract females by breaking out the bass. ->
Bats in Peru attack unsuspecting penguin chicks living in dark caves.
->
City birds that get exposure to low levels of nighttime lighting mature more quickly. ->
The owl whistles a one-note song that rhymes with the name of its island home. ->
+ Load More
