All about the Eastern Cottontail Rabbit

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Rabbits don’t have it easy. They’re prey for just about anything that’s large enough to catch and hold onto them. They’re lucky if they live for 12 months, even though their potential lifespan is eight to 10 years. At least 50 percent never leave the nest. Pity the poor rabbits.

For that alone, it would seem they deserve some easy pickings here and there in their very brief lives, but they can be a troubling nuisance when they nibble on elegant specimen grasses, snip tender branches off precious shrubs or bite off the flowers of prized plants. Then there’s the leveling they can do to a vegetable patch—that alone can leave a hardworking gardener feeling bereft. For most of us, it’s a cottontail we see doing all that damage, but, children love them–think of Thumper in Bambi and Walt Disney’s Bugs Bunny–and most adults, too. Even those who scheme to prevail and often lose in an ongoing garden war with them. Pity the poor humans!

Background

The oldest complete rabbit fossil, found in 2008 in India, dates back fifty-three million years to the Eocene Epoch. It was a rabbit that hopped and was very similar to those of today, but with smaller ears and a longer tail. In 2011 a gigantic fossil was unearthed on the small island Mallorca, off the coast of Spain. It was six times the size of the four-pound cottontails of today, had smaller eyes and ears, dug for its food and didn’t hop. It’s so unlike other rabbit fossils that researchers believe it developed that way due to its isolation.

There are 13 species of rabbits. Nine of them are cottontails that inhabit North America, Mexico, and Central and South America. The most widespread rabbit in the United States is the Eastern Cottontail. So we’ve focused on it, but, really, most of what you’ll read here applies to all cottontails. They’re all similar in appearance and habits and primarily differ only in size, habitat, and range.

Eastern Cottontails, Sylvilagus floridanus, are in the order Lagomorpha (lag-oh-MOR-fuh) and family Laporidae. They inhabit southeastern Canada, the Great Plains and East Coast and down to South America. They’ve also been introduced in areas of the Southwest and Northwest. 

Physical description

Eastern Cottontails are named for their short, white, cottony-looking tail. Males and females are generally the same size and color. Adults are 15–19 inches long (38–48 cm) and weigh 2–4 pounds (0.9–1.8 kg). Their ears are 2–3 inches long (4.9–7.6 cm); they hold them straight up and can swivel them independently.

The hair on the upper part of their body consists of a dense, buff-brown underfur covered by longer, coarser, gray- and black-tipped guard hairs. Their underside is white. They shed their hair twice a year, and in the winter, it’s longer and grayer.

Cottontails have large, brown, protruding eyes situated high and on the sides of their head. That gives them 360 degrees of vision, except for a small blind spot directly in front. If you were to face one straight on, it would slightly turn its head to get past that blind spot to see you better. Their eyesight is designed for detection of movement, and while good it lacks the focal precision of a human’s. They have color vision, but it seems to be limited to some blue and green wavelengths.

Their teeth are adapted to ripping and gnawing on plants, including the bark of trees. The upper front teeth grow continuously, which allows the rabbits to munch away without wearing them down. Indeed, the rabbits must gnaw to keep them “filed” to the proper length–teeth that get too long or become maladjusted can prevent them from eating and lead to starvation.

Several cottontails running around in a yard

Playful young cottontails. (Daniela Corno / Stockxchng; PD)



Cottontails are built for speed, jumping, and agility. They have powerful legs and large back feet, which enables them to run at up to 18 miles per hour (29 kmh) for up to half a mile (0.8 km). Not just that, but they can turn on a dime in a zig-zag pattern as they go to confuse predators. If they must, they’re also strong swimmers.

Senses

Have you noticed that rabbits twitch their nose? They do it between 20 and 120 times a minute, and for a good reason: They’re smelling scents in the air. The twitching exposes some of the one-hundred million sensing receptors they have in their nose, which makes an already-exceptional sense of smell even more delicate. (Humans, by comparison, have merely five or six million receptors.) Watch a rabbit twitching its nose  

Cottontails can see and hear pretty much everything that’s around them. Their hearing is especially keen. They can move their long ears back and forth, and separately, too, which helps them determine a sound’s direction. And, the ears are cupped, which helps to catch and amplify sound waves.

Photo of cottontail rabbit showing cupped shape of its ears.

Cupped ears catch sounds from far away. (Jim, the Photographer / Flickr; cc by 2.0)



Rabbit or hare?

They’re closely related, but not quite the same. Hares are born with hair, their eyes open, and good vision; rabbits are born mostly bald, with eyes closed. Hares are generally larger and have longer legs and ears. They’re also rather solitary while–except for cottontails–rabbits live in social groups and nest in burrows or warrens. Hares typically live in open areas, like deserts, while rabbits do not.

Behavior

Eastern Cottontails are mostly crepuscular (active at dawn and dusk) and spend most of the day hidden within thick cover or, in harsh winter weather, burrows. They occasionally pop out in mid-day to nibble on some food. They have very few sweat glands, so in the summer when they get hot, the blood vessels in their ears dilate to dissipate heat, and they might pant through their nose. Another way they get rid of heat is by lying on cool soil.

Eastern Cottontail resting in a form.

Eastern Cottontail resting in a form. (Nancy Magnusson Flickr; CC BY-NC 2.0)



Always on the lookout for danger, the rabbits typically move slowly and hop only short distances, then crouch or freeze to avoid catching the attention of predators. If they must flee, they bound away through one of several escape routes they’ve already plotted throughout their range.

The routes may include holes in fences, paths through dense vegetation or even through tunnels with multiple exits. If caught, they might play dead by going limp in the predator’s mouth. When the predator drops them, they suddenly race away. If all else fails, they’ll try to fight. 

Like other rabbits, Eastern Cottontails fight each other, too: Their ears go back, the chin juts forward, thumping begins, growls are emitted, and a war is on. It can be fierce, with jumping, chasing, biting, and boxing involved. Males fight with other males for females. Females will fight each other for control of a territory. And juveniles play-fight. The origin of the term “rabbit punch” is based on an action sometimes undertaken by a cornered rabbit: It leaps in the air and over the back of its predator. As it sails over it gives the predator a powerful kick in the head or neck with its hind legs. (Be careful if handling a wild rabbit—humans, too, can be at the receiving end of these surprisingly strong, aggressive maneuvers. They’ll also bite.) 

Communication

Cottontails are vocal animals and make many different sounds. They growl and grunt; warn others with a cry or by stamping their hind feet to transmit vibrations; make distress calls; and may scream when caught by a predator. They express contentment with a “purr.” That evokes the sound of a cat’s throaty rumble, doesn’t it? But a cottontail’s is different because it’s produced by grinding their teeth. 

Intelligence and emotions, too

Are rabbits smart? Well, you be the judge: They’re capable of learning their name and will follow simple commands. They also can be flawlessly trained to a litter box. One owner of a domestic rabbit says her pet has learned to unlatch his cage and also leads her to the food storage container when his food bowl goes empty.

As for emotions, medical imaging studies have shown that humans and animals have the same neural activity in primitive parts of the brain that are associated with emotions. That implies that rabbits experience at least some feelings as we do, even if not to the same degree. Owners of domesticated rabbits claim they show anger, jealousy, love, grief, and other emotions.

Reproduction

As you may already know, rabbits are birthing machines. Males may be sexually mature at only one month of age and females within their first year. Eastern Cottontail breeding season is from about January through June, with most young born in May and June. Mating and births occur a little later in the north and earlier in southern climates.

Cottontails have an impressive courtship display: A male chases a female until she turns and faces him, after which she stands up on her hind legs and punches him in the ears and face! The two rabbits then sit facing each other. The male moves toward the female, and then leaps up to 15 feet (4.57 m) into the air and flips around 180 degrees. Meanwhile, she runs under him and turns 180 degrees. When he lands, they’re both facing each other again. Then the female does the jump-and-spin while he does the run-and-spin. They alternate doing this repeatedly until mating commences. Whew! That’s the inspiration for the phrase “Mad as a March hare.” The female won’t mate again until after her litter is born.

Two cottontails, one facing left and jumping over one just below it which is running to the right.

Young cottontails practicing their courtship ritual. (Porsupah Ree / Flickr; cc by-nc-sa 2.0)



The female is capable of producing a litter of up to eight or more babies (called kits or kittens) every 30 days. They may have up to five pregnancies per season, but usually only three, each time producing four or five kits. A different male fathers each litter and males don’t participate in the parenting.

Nesting and bunnies

Eastern Cottontail kits might be born in an old burrow, but it’s more likely to be a narrow hole 4–6 inches deep (10–15 cm), dug by their mother in tall grasses, under thick bushes, or another place she thinks is safe. She lines it with grass and soft fur she plucked from her own body for insulation.

At birth, the kits are about 4 inches long, deaf, blind, nearly bald and their ears are flattened. Their mother nurses them for the first time and then covers them with grasses, leaves, fur or other soft debris. She doesn’t remain with them, to avoid attracting attention. 

The mother’s milk is so highly nourishing she needs to come to them only twice a day—early in the morning and at dusk. She stays near them, at least part of the day, resting in a slight depression, called a form, that she creates by scraping away or trampling down the soil or vegetation.

Three baby cottontail rabbits visible lying in nest dug into pile of wood mulch.

Rabbit nest hidden in chipped-wood mulch. (Rklawton / Wiki; CC BY-SA 2.5)



The kits snuggle tightly side by side and stay still and quiet. Their eyes open in about a week. In two weeks they begin taking tentative excursions from the nest and, at about this same time, their long ears start to raise up from their flat position.

Starting at about 10 days the kits eat their mother’s “cecotropes” (SEE-ko-tropes). These are pellets that exit through her anus, but they aren’t feces. Instead, they’re highly nutritious, gel-like, fermented droppings are produced in a rabbit’s cecum, a pouch located between the large and small intestines. Cecotropes contain proteins, fiber, B and K vitamins, other nutrients, and gut microbes that are essential in the digestion of solid food. Without them, the kits’ guts become overwhelmed with abnormal bacteria, and they can die a painful death. (Domestic kits need them, too, at this age, and partly for this reason, it’s difficult to keep orphaned ones alive.)

Adult rabbits of all species produce and eat their cecotropes to re-ingest nutrients, consuming them directly from their anus as they’re expelled. Because they’re taken this way, they’re rarely seen. The round, brown pellets we see rabbits leave behind on the ground are true feces. (This re-ingestion of nutrients is similar to deer and other ruminants that chew their cud, which can read about on this page: White-tailed Deer.)

Mother cottontail standing over her nest with babies suckling her teats.

Cottontail Mother feeding her kits. (Geoff Chandler / DCResource; cc by 2.0)

The cottontail mother continues to visit her kits until they’re 18 to 21 days old. By then, they’re foraging on their own but still need her milk. They grow into fluffy, playful juveniles, jumping into the air and chasing each other around while making low purring, growling, and grunting sounds. All this playing gives them the skills they’ll need for maneuvers to win mates, rule their turf and save their lives. They hang around together for about seven weeks and then split off into their solitary lives. Watch a mother defend her babies from a snake

Food sources

Cottontails are herbivores with 17,000 taste buds (humans have 8,000 –10,000), so they probably enjoy an intense flavor array, with subtleties we humans can’t imagine. There may be an exquisite expanse of flavors in, say, salad greens that we humans can’t detect, but make them delectable to rabbits.

In spring and summer, cottontails feed on buds, clover, lush grasses, dandelion heads, flower blossoms, legumes, lettuce, and even fruit. In winter, they eat buds, stems, and the bark of woody plants, including young trees. They also eat spilled seed at bird feeders.

Habitat

Eastern Cottontails are territorial, especially the females during mating season. Neither sex ventures very far from their preferred home turf. They’re active year-round and prefer edge environments—open areas flanked by dense cover, such as meadows, farmlands, the edge of swamps and marshes, residential areas, and forest clearings. They travel a route of relative safety. For instance, one might skirt the side of a woodpile, follow along the front of some thickets, then brush through grasses and finally push through the hedgerow to the meadow. City life has put these fragile animals at a bit of a disadvantage against predators because of the lack of thickets and dense grasses.

Defenses

If a cottontail detects a predator first, it will freeze. Staying still can hide it, even in the open because its hair color usually blends into the surroundings, but movement will draw the eye. If detected, it flees. Speed and agility are to its advantage and it has several escape routes and hiding places preplanned. This usually works, though not always, and it may get caught or cornered. In that event, as Mahatma Gandhi once said (probably in a different context), “A rabbit that runs away from the bull-terrier is not particularly non-violent.” Its powerful legs and a swift kick can stun a predator long enough for it to escape, and it can bite, too. 

Predators

Rabbits are an important link in the food chain, and if their plenteous rate of reproduction is any indicator, nature intended it that way. Still, it’s sad to think of how expendable and vulnerable they are. Predators include owls, crows, hawks, foxes, skunks, coyotes, raccoons, opossums, snakes, weasels, cats and dogs, hunters, and vehicles.

*Top photo: Eastern Cottontail. (Minnie the Pookie / Flickr cc by-nc 2.0)

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