While foxes do not howl or socially vocalize the way coyotes and wolves do, they still have a limited range of vocal communication. Family members will occasionally use these calls to keep track of one another when separated, or warn of danger. Some forty different calls have been documented, the meaning of which are not completely understood. The foxy vocabulary ranges between chuckling, ´gekkering´ noises, whining, whimpering, shrieking, and shrill screams. A drawn out alarm bark can carry up to a mile in distance. Fox voices are higher pitched than those of dogs, and can sound similar to that of crows and ravens.