As the sunset colors fade from purple to black an eerie sound breaks the forest calm. It is not the long, low, slow howling of wolves that can be heard further north, but the group yip-howl of coyotes: short howls that often rise and fall in pitch, punctuated with staccato yips, yaps, and barks.

When people hear coyote howls, they often mistakenly assume that they’re hearing a large pack of animals, all raising their voices at once. But this is an auditory illusion called the “beau geste” effect. Because of the variety of sounds produced by each coyote, and the way sound is distorted as it passes through the environment, two of these tricksters can sound like seven or eight animals.

Group yip-howls are produced by a mated and territorial pair of “alpha” coyotes, with the male howling while the female intersperses her yips, barks, and short howls. “Beta” coyotes (the children of the alpha pair from previous years) and current year pups may join in if they are nearby, or respond with howls of their own.


And once one group of coyotes starts howling, chances are that any other alpha pairs nearby will respond in kind, with chorus after chorus of group yip-howls rippling across the miles.