The reintroduced wolves are producing more offspring than expected. When ten breeding pairs reside in the region for three years, the gray wolf will be taken off the list of endangered species in the northern Rocky Mountains. Wolf biologists estimate that this goal may be met by the year 2002 without the transplanting of additional wolves from Canada. 1993-1996 Microsoft Corporation. All rights reserved.
Females are usually slightly smaller.
Forests, tundra, deserts, plains and mountains. Size of the pack varies with the size of available prey. Packs that feed on deer may average only 3-6 animals, while those preying on moose can be as large as 15. A hierarchy of dominant and subordinate animals within the pack helps it to function as a unit. Wolves communicate with fellow pack-mates and other wolf packs by scent marking, vocalizations, facial and body postures.