Interesting Facts
There are three species of wolves in the world: the gray wolf (Canis lupus), the red wolf (Canis rufus) and the Ethiopian (or Abyssinian) wolf, (Canis simensis). Some researchers believe the Ethiopian wolf is not a wolf, but actually a jackal.
Wolves usually live in packs which consist of the adult parents, referred to as the alpha pair, and their offspring of perhaps the last 2 or 3 years. The adult parents are usually unrelated and other unrelated wolves may sometimes join the pack.
Pack size is highly variable because of birth of pups, dispersal, and mortality. Generally, a gray wolf pack has from six to eight wolves, but in Alaska and northwestern Canada some packs have over 30 members. Red wolf packs are generally smaller than gray wolf packs and usually have 2 to 8 members, but a pack of 12 is known in the wild.
The gestation period of gray and red wolves is usually around 63 days
The average length (tip of nose to tip of tail) of an adult female gray wolf is 4.5 to 6 feet; adult males average 5 to 6.5 feet. The average height (at the shoulder) of a gray wolf is 26 to 32 inches. The average length (tip of nose to tip of tail) of an adult red wolf is 4.5 to 5.5 feet. The average height (at the shoulder) of an adult red wolf is about 26 inches.
Adult gray and red wolves have 42 teeth, while adult humans have 32.
The massive molars and powerful jaws of a wolf are used to crush the bones of its prey. The biting capacity of a wolf is 1,500 pounds of pressure per square inch. The strength of a wolf's jaws makes it possible to bite through a moose femur in six to eight bites. In comparison, a German shepherd has a biting pressure of 750 pounds per square inch. A human has a much lower biting pressure of 300 pounds per square inch.
Gray wolves can survive on about 2 1/2 pounds of food per wolf per day, but they require about 5 pounds per wolf per day to reproduce successfully. The most a gray wolf can eat in one sitting is about 22.5 pounds. Red wolves eat an average of 5 pounds of food per day, but have been known to eat up to 12 pounds in one sitting.
Gray wolves in the wild have an average life span of 6 to 8 years, but have been known to live up to 13 years in the wild and 16 years in captivity. Red wolves in the wild have an average life span of 8 to 9 years, but have been known to live up to 12 years in the wild and 16 years in captivity.
Wolves will travel for long distances by trotting at about five miles per hour. They can run at speeds of 25 to 35 miles per hour for short bursts while chasing prey.