How are tree squirrels different from ground squirrels?

Tree squirrels and ground squirrels are both members of the family Sciuridae, but they differ significantly in their physical adaptations, habitats, and behaviors.

Physical Adaptations
Tree squirrels possess slender bodies with long, muscular limbs and sharp, curved claws that allow them to navigate vertical surfaces and slim branches. Their ankle joints are highly flexible, enabling them to descend trees headfirst. In contrast, ground squirrels are generally adapted for terrestrial life, often featuring specialized snouts or claws for digging in soil or rotting wood to find food.12

Habitat and Behavior
Tree squirrels are primarily arboreal and diurnal, typically constructing nests in the forest canopy or tree hollows. While some species forage on the ground, they are defined by their ability to navigate the treetops. Ground squirrels, as their name suggests, live and forage on the ground, often residing in burrows.12

Diet
Both groups are omnivorous, consuming plant and animal matter, though their specific food sources vary by environment. Tree squirrels rely heavily on nuts and fruits, using strong jaws to gnaw open hard shells. Ground squirrels consume a wider range of insects and green plant parts, with some species exhibiting specialized foraging behaviors like digging for larvae.21