Tamiasciurus hudsonicus, commonly known as the American Red Squirrel, is native to North America. Its geographical distribution extends across Canada, the United States, and parts of the Rocky Mountains.

The American Red Squirrel typically inhabits coniferous forests where it finds its primary food sources, including pine seeds and spruce cones. These forests are characterized by cold, temperate climates with distinct seasonal variations. The squirrels also occasionally occupy mixed woodlands if coniferous options are sparse.

Tamiasciurus hudsonicus plays a crucial role in its ecosystem by affecting the composition and regeneration of forests through its feeding habits and seed dispersal. It also serves as a prey species for various predators, contributing to the food web dynamics of its habitat. Regional variations exist, with some subspecies adapting to different coniferous tree species present in their localized habitats.