Rabbits and hares are both members of the Leporidae family, but they have some differences in their physical appearance, behavior, and habitat. Here are some of the main differences between rabbits and hares:

1. Physical appearance: Hares tend to be larger than rabbits and have longer legs and ears. They also have black markings on their fur, which rabbits typically do not have.

2. Habitat: Hares tend to live in open fields and grasslands, while rabbits prefer areas with more cover, such as forests or brushy areas.

3. Behavior: Hares are generally more solitary than rabbits, and tend to be more active during the day. Rabbits, on the other hand, are more social and tend to be more active at dawn and dusk.

4. Reproduction: Hares typically give birth to their young (called leverets) in shallow depressions in the ground, while rabbits build nests in burrows or other protected areas.

5. Running style: Hares are known for their powerful running ability and can reach speeds of up to 45 mph (72 km/h). Rabbits, while also fast runners, tend to run in a zig-zag pattern to evade predators.

Overall, rabbits and hares are similar in many ways, but have some distinct differences in their physical appearance, behavior, and habitat.