The social behaviour of squirrel monkeys Group size in the wild varies significantly in different geographic areas. The most common size is from 20 to 40 animals; however, groups exceeding 200 animals ...

One of the biggest red squirrel protection groups in England says it is facing an "invasion" of greys. The larger grey squirrel is classified as an invasive non-native species and has contributed ...

Their eyes are large, helping these nocturnal mammals navigate the dark, and their fur color and markings vary by species. Some flying squirrels have only one mating cycle per year but others ...

Fox squirrels grow up to 26 inches long (from head to tail), weigh nearly 3 pounds, and have been known to live up to 20 years in captivity, state biologists say.