- The average litter of Mexican wolves is between four and seven pups
- Due to hunting, Tasmanian devils neared extinction at the beginning of the 20th century. Tasmanian wolves (also called tigers) became extinct in 1936. Today Tasmanian devils are endangered by a cancer called Devil Facial Tumor Disease
- All dogs, from the German Shepherd to the tiny Poodle, are direct descendants of wolves. They can all breed together and produce fertile offspring
- Coyotes can breed with domestic dogs and wolves and the Ethiopian wolf lives above 10,000 feet elevation
- Donkeys have a natural and aggressive dislike of coyotes, wolves and other canines (including domestic dogs)
- Biologists have found that wolves will respond to humans imitating their howls. The International Wolf Center in Minnesota even sponsors “howl nights” on which people can howl in the wilderness and hope for an answering howlWolves may use the same dens to raise their cubs year after year and wolves, bears, apes use urinate to claim territory
- Wolves do not make good guard dogs because they are naturally afraid of the unfamiliar and will hide from visitors rather than bark at them
- Wolves run on their toes, which helps them to stop and turn quickly and to prevent their paw pads from wearing down
- Wolves have about 200 million scent cells. Humans have only about 5 million. Wolves can smell other animals more than one mile (1.6 kilometers) away
