Grey Squirrel - Sciurus carolinensis - Skull showing deformity in incisors. Length 45-55cm Abundant rodent. Introduced to Britain, now the most familiar squirrel. Diet is omnivorous and renowned for its cunning in exploiting food sources. Adult has plump but elongated body and long bushy tail. Rounded ears lack ear tufts. Coat is mainly grizzled grey with whitish chest and belly. Some individuals are variably tinged with brown in summer. Utters teeth-smacking ‘tchack’ when alarmed. Native to North America, introduced here in 1876. Now widespread and common, its adaptability allowing it to thrive in woods, parks and gardens.