Cottontail Rabbits: Fact sheet from Connecticut Department of Environmental Protection discusses the New England cottontail (Sylvilagus transitionalis) and eastern cottontail (S. floridanus).
Desert Cottontail (Sylvilagus audubonii): Fact sheet from The Mammals of Texas includes photo, physical description, range within the state, and habits.
Eastern Cottontail (Sylvilagus floridanus): Fact sheet from The Mammals of Texas includes photo, physical description, range within the state, and habits.
Swamp Rabbit (Sylvilagus aquaticus): Fact sheet from The Mammals of Texas includes photo, physical description, range within the state, and habits.