September 30, 2009 Every spring, male grouse gather in the Great Plains and engage in a mass act of strutting, showmanship and general vocal frenzy that would put Mick Jagger to shame. For researchers, it's an opportunity to observe how these animals interact in a rapidly changing American West.
June 8, 2009 Full-throated rumbling and roaring is one of the ways male bison establish their dominance in the herd. When a female runs through a group of males, it often provokes a "fighting storm" — the males bellow, head-butt and fight. In the end, the most dominant male in the group will pair with the female.
February 13, 2009 Spotted hyenas, the social, carnivorous creatures often referred to as "laughing hyenas," live across Africa and east to India. Their laughing sound, however, has nothing to do with their having a good time. Rather, hyenas giggle when attacked or when they are competing for access to a carcass.
December 10, 2008 The world is full of unusual animal sounds — and among the more unusual is the call of the bare-throated tiger heron. Greg Budney, a biologist from the Cornell Laboratory of Ornithology, recorded one of these long-legged wading birds in Guatemala. The bird, he says, makes him "think of a large cat."
August 25, 2008 It's a common sound in the Australian bush, starting up just around daylight: the laughing call of the kookaburra. These birds get together in small groups, have a chat and then go into a full laughter song, letting other kookaburras know where their territory is.