Grey squirrels, Sciurus carolinensis

Reproduction
They usually have two litters a year, in early spring and summer.
Grey squirrels typically have three to seven kittens.

• Pregnancy (gestation) lasts roughly 44 days, with the young weaned at seven weeks and ready to leave the frey at 10 weeks old.
• Kittens are born with closed eyes, no teeth and no hair. After about seven weeks they look like small versions of their parents and are ready to leave the drey.
• Female squirrels can live up to five years, with male squirrels averaging around two-three years. 

Behaviour
Active during the day, squirrels spend most of their time in the trees, coming down to the ground to search for food. They are superb climbers, moving rapidly through the trees and leaping between them with ease. It is one of the few mammals which can climb head first down a tree. Grey squirrels do not hibernate, so may be seen at all times of the year.