The grey wolf (Canis lupus), or just wolf, is a mammal of the order Carnivora, and the ancestor of the domestic dog.It is sometimes called timber wolf.A recent study found that the domestic dog is descended from wolves tamed less than 16,300 years ago south of the Yangtze River in China.. There are many different wolf subspecies, such as the Arctic wolf.

: https://kids.kiddle.co/Grey_wolf

A female polar bear typically gives birth to twins, though singles and triplets have been recorded. At birth, a cub weighs only 1.3 pounds (about half a kilogram), but they grow very quickly.

: https://www.livescience.com/27436-polar-bear-facts.html

The cheetah (Acinonyx jubatus; / ˈ tʃ iː t ə /) is a large cat of the subfamily Felinae that occurs in North, Southern and East Africa, and a few localities in Iran.It inhabits a variety of mostly arid habitats like dry forests, scrub forests, and savannahs.The species is IUCN Red Listed as Vulnerable, as it suffered a substantial decline in its historic range in the 20th century due to …

: https://en.wikipedia.org/wiki/Cheetah

Polar bears roam the Arctic ice sheets and swim in that region’s coastal waters. They are very strong swimmers, and their large front paws, which they use to paddle, are slightly webbed. Some …

: https://www.nationalgeographic.com/animals/mammals/p/polar-bear/

The giraffe (Giraffa) is a genus of African even-toed ungulate mammals, the tallest living terrestrial animals and the largest ruminants.Taxonomic classifications of one to eight extant giraffe species have been described, based upon research into the mitochondrial and nuclear DNA, as well as morphological measurements of Giraffa, but the International Union for Conservation of Nature …

: https://en.wikipedia.org/wiki/Giraffe