Black-tailed Jackrabbit (Lepus californicus): Fact sheet from The Mammals of Texas includes photo, physical description, range within the state, and habits.
Lepus americanus (Snowshoe Hare): Biological information and images, from Animal Diversity Web.
Lepus europaeus (European Hare): Information and image from the Animal Diversity Web, including geographic range, reproduction, behavior, food habits, and conservation status.