Each wolf has a unique vocal "fingerprint," allowing other pack members to identify exactly who is calling from a distance.

Add Yahoo as a preferred source to see more of our stories on Google. Humans have evolved to become nature's ultimate predator, but when it comes to other formidable creatures, we don't always feel as ...

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.