Canadian Wildlife Federation
Hinterland Who's Who: Woodchuck
Canadian Wildlife site features the woodchuck. Highlights its habitats and habits, range, feeding and breeding characteristics.
Canadian Museum of Nature
Canadian Museum of Nature: Woodchuck
The woodchuck is also know as the ground hog. Described are it's appearance, characteristics, homes and locations. Ten photographs provide a close up glimpse of this interesting rodent.
Other
North Carolina Museum of Natural Sciences: Groundhog
Brief overview of the characteristics of the Groundhog, the only animal that has a holiday associated with it.