Year of 2017

A gray wolf in Yellowstone National Park, Wyoming

In 1872, when Yellowstone National Park became the first national park in the US, the gray wolf population there was in steep decline due to hunting. Government predator control programs in the early 20th century accelerated this trend, and wolves were eliminated from Yellowstone altogether by 1926. But that would all change when the alpha predator was reintroduced to the park in 1995. Many of the nearly 200 wolves that roam the park today, like the one seen in this photo, wear tracking collars. These collars allow researchers to monitor the movements and hunting habits of the wolves. The wolves’ reintroduction to Yellowstone has helped return the elk population to its historically low levels, which in turn has helped the park’s ecosystem repair itself.

The gray wolf or grey wolf, also known as the timber wolf or western wolf, is a canine native to the wilderness and remote areas of Eurasia and North America. It is the largest extant member of its family, with males averaging 43–45 kg, and females 36–38.5 kg. Like the red wolf, it is distinguished from other Canis species by its larger size and less pointed features, particularly on the ears and muzzle. Its winter fur is long and bushy, and predominantly a mottled gray in color, although nearly pure white, red, or brown to black also occur. As of 2005, 37 subspecies of C. lupus are recognised by MSW3.
Scientific name: Canis lupus
Lifespan: 8 years – 13 years on average (In wild)
Weight: 94.80 pound (43 kg) – 99.21 pound (45 kg) on average (Male) · 79.37 pound (36 kg) – 83.78 pound (38 kg) on average (Female) · 0.66 pound (0.30 kg) – 1.10 pound (0.50 kg) (Newborn)
Speed: 31.07 mph (50 km/h) – 37.28 mph (60 km/h) (Running) · 4.97 mph (8 km/h) – 5.59 mph (9 km/h) (Loping pace)
Height: 31.50 inch (80 cm) – 33.46 inch (85 cm) on average
Length: 41.34 inch (105 cm) – 62.99 inch (160 cm) on average

Wolf Distrubtion Range