However, because of their prolific breeding habits, cottontail rabbits are very abundant. Cottontails can raise up to six litters a year beginning in late March with an average litter size of six. Once a female rabbit has given birth, she is capable of breeding again very quickly. Under ideal conditions, a pair of rabbits can produce up to 36 offspring in one season. Fortunately, natural mortality factors such as weather, predators, and disease keep rabbits from realizing their full reproductive potential.
Rabbits tend to congregate in favorable habitats where there is suitable food and cover.
They typically remain in a limited area of 20 acres or less unless their food source is compromised. In urban areas, locations devoid of rabbits rarely stay that way for long since rabbits are usually abundant nearby that will readily move into the site. Cottontail rabbits burrow in natural cavities or burrows excavated by woodchucks or other animals. This nest-like depression gives the rabbit some protection from the weather. In urban areas, they frequently seek shelter under decks, sheds, rock and wood piles and stacked building materials.