… That the Grizzly Bear is a subspecies of the Brown Bear and can get up to 8 feet (2.5m) tall (standing up). With 800 pounds (360kilograms) they for sure are no light-weights either.
Grizzly bears are specially adapted to survive the changing seasons. During warmer months, they eat a massive amount of food so they can live off body fat during the winter, when food is scarce. They may intake 90 pounds (40 kg) of food each day, gaining over 2.2 pounds (1 kg) of body weight a day. As omnivores, grizzlies will eat anything nutritious they can find, gorging on nuts, fruit, leaves, roots, fungi, insects, and a variety of animals including salmon and other fish, rodents, sheep, and elk. Their diet varies depending on what foods are available for the season.
The bears settle in their dens (which they start digging when during fall) to hibernate for the winter. This deep sleep allows the grizzlies to conserve energy. Their heart rate slows down from 40 beats per minute to 8, and they do not go to the bathroom at all during these months of slumber.
Now here’s a very interesting fact: Pregnant grizzly bears even give birth in their sleep! Midwinter, grizzly bear cubs (usually born in pairs) arrive into the world blind, hairless, and toothless. They use what little strength they have to nestle into their mother and nurse. For a month, the cubs feed on their mother’s milk and gain strength. By the time spring comes, the cubs have opened their eyes and grown teeth and fur; the new family is ready to venture outside the den.
Now just imagine! I guess a Grizzly does not get sleep debriefed…
The cubs stay under their mother’s care for 2-3 years. While mother grizzlies are fiercely protective of their cubs (so don’t even think about playing with the cuddly baby teddies…), nearly half the cubs do not survive past the first year, falling to disease, starvation, and predators like wolves, mountain lions, and adult male grizzlies.