Add Yahoo as a preferred source to see more of our stories on Google. FILE: Wolf 1229 howling in Yellowstone National Park, which includes parts of Wyoming, Montana and Idaho. (Scott Wolff/Cry Wolf ...

This time of year, the sound of a wolf howl piercing the night can really send shivers up your spine. But that call of the wild isn’t meant to scare you; it’s actually a message to other wolves.