Did you know that the grizzly bear is a type of brown bear? Native to North America, grizzly bears can hibernate for up to seven months during the winter season — they can even go months without using the bathroom!
Habitat: Grizzly bears live in forests and scrublands in Canada and the United States.
Diet: The grizzly bear will eat just about anything. Pine nuts, moths, berries, roots, and bulbs make up the majority of their diet throughout the year.
Family Life: Grizzly bears begin mating in the spring and summer. Female grizzlies experience “delayed implantation,” meaning that when a female becomes pregnant, the embryo stops developing for several months. Once the mother enters hibernation, the embryo will begin gestation. A few months later, she will welcome one to four cubs. Interestingly, cubs in the same litter can have different fathers.
The grizzly bear’s endangered status is listed as threatened.
- Despite their large and intimidating size, hunting of the grizzly bear by humans has over time led to a drastic decline in the grizzly bear population.
- Habitat loss and climate change also pose serious threats to this bear species. National wildlife groups are committed to finding suitable habitats in which the grizzly bear can live and thrive.
- Grizzly bears are named after their brown fur that can be “grizzled” in white.
- Leading up to hibernation, they can gain over three and a half pounds a DAY!
- Aside from time spent breeding and raising cubs, grizzlies spend most of their time alone.
CLASS: Mammalia (mammals)
ORDER: Carnivora (carnivores)
FAMILY: Ursidae (bears)
GENUS: Ursus (bears)
SPECIES: Ursus arctos (grizzly bear)
LIFE SPAN: 22 – 26 years (wild) / 44 years (zoo)
HEIGHT: 4 feet (1.2 m) at the shoulder
WEIGHT: 300 – 800 pounds (136 – 363 kg)
LENGTH: 6.5 feet (2 m)
The National Wildlife Federation