I recently saw a black squirrel with white nose He was bigger than most squirrels and walked like bear not but had tail What could he be?

Based on your description, the animal you saw could be a fox squirrel. Fox squirrels are larger than most other squirrel species and are known for their black fur with white or gray tips on their tails and a white underside. They also tend to have a bushy tail and walk with a gait that resembles a bear's. Fox squirrels are native to North America and can be found in a variety of habitats, including forests, parks, and urban areas.