1. _Canis lupus lupus_: This subspecies includes the Eurasian wolf, which is found in Europe and Asia. It is the largest of the wolf subspecies.
2. _Canis lupus familiaris_: This subspecies includes the domestic dog. The dog is descended from wolves that were domesticated thousands of years ago. Dogs come in a wide variety of breeds, each with its own distinct characteristics.
3. _Canis lupus hallstromi_: This subspecies is found in Australia and New Guinea. It is a smaller subspecies of wolf, and is characterized by its black fur.
4. _Canis lupus dingo_: This subspecies is found in Australia and Southeast Asia. It is believed to have been introduced to Australia by humans. The dingo is a smaller subspecies of wolf, and is characterized by its reddish fur.
In addition to these four main groups, there are a number of other subspecies of wolf that have been identified. These include the Mexican wolf (_Canis lupus baileyi_), the Ethiopian wolf (_Canis lupus simensis_), and the red wolf (_Canis rufus_).
The wolf is a highly adaptable species, and can be found in a wide variety of habitats. Wolves are social animals, and live in packs. They are predators, and their diet consists mainly of deer, elk, moose, caribou, and bison. Wolves are also territorial animals, and will defend their territory from other wolves and predators.