Geocapromys brownii, commonly known as the Jamaican hutia, is restricted to the interior regions of the Caribbean island of Jamaica.

Biogeographic Regions: neotropical (Native )

Other Geographic Terms: island endemic

These large rodents have a body length of 330 to 445 mm. Geocapromys brownii have short, nearly vestigial tails between 35 and 64 mm. in length (Nowak 1999). They have the shortest tails of all of the hutias. Due to their massive heads and short necks and legs, Jamaican hutias take on a stout appearance. The fur on the back is thick and coarse, ranging in color from reddish-brown to almost black. The tail is scaly with tufts of black fur on its upper surface. The feet are covered in very rough, short black hair. The whiskers or vibrassae are long and the ears short.

Geocapromys brownii have the largest skulls of all of the three species of hutia. The sagittal crest is fairly prominent. The jugal is also unusually wide and located far below the orbits.

The dental formula is 1/1, 0/0, 1/1, 3/3 (incisor, canine, premolar, and molar, respectively). The cheekteeth display a hypsodont occlusal pattern and are almost perfectly flat on their upper surfaces (Anderson et al. 1983).

Range mass: 1.000 to 2.000 kg.

Average basal metabolic rate: 4.11 W.

• Terrestrial

The Jamaican hutia prefers to live on exposed sites usually made of limestone. Geocapromys brownii will fashion homes out of natural crevices or tunnels in the rock. In captivity, they have shown that they do not build nests, but prefer empty, enclosed spaces. At night, Jamaican hutias will move through the shrubby areas, foraging for food (Anderson et al. 1983).

Terrestrial Biomes: scrub forest

Jamaican hutias are nocturnal foragers. These herbivores feed on numerous plant species and plant parts. They scour large expanses of land for any exposed roots, bark, shoots, and fruit. Geocapromys brownii also eat the foliage from a great variety of plant species (Anderson et al. 1983).

Average lifespan

Status: captivity: 8.3 years.

Geocapromys brownii have been known to breed throughout the year in the wild, producing two to three litters annually. With a gestation period of about 123 days, females produce an average of 1.49 offspring per litter (Anderson et al. 1983). Jamaican hutias will most commonly have between one and two offspring, but litters of three have been reported. Upon their birth, the infants are quite capable. It has been reported that after the first 30 hours of life, the infants are already eating solid foods (Nowak 1999). A female's estrous cycle lasts about 10 days (Anderson, Jones et al. 1984). Males leave scent-marks that may play a role in breeding, but little information exists on reproduction (Anderson et al. 1983).

Range number of offspring: 1 to 3.

Average number of offspring: 1.49.

Average gestation period: 123 days.

Key Reproductive Features: iteroparous ; year-round breeding ; gonochoric/gonochoristic/dioecious (sexes separate); viviparous

Average gestation period: 123 days.

Average number of offspring: 2.

Average age at sexual or reproductive maturity (female)

Sex: female: 365 days.

Parental Investment: precocial

The IUCN had classified G. brownii as vulnerable. There has been concern that Jamaican hutias may soon be wiped out because of human activities. A few of its fellow species have already gone extinct from other Caribbean islands. In the past 30 years, this species has declined drastically due to human activities. Hutias are protected under Jamaica's Wildlife Protection Act of 1945, but it has not been enforced and the hunting continues. This species continues to decline because of the demand for agricultural lands. Mongooses also have been introduced to the region and have been partly to blame for the popululation losses (Anderson et al. 1983).

CITES: no special status

IUCN Red List of Threatened Species: vulnerable

Jamaican hutias can inflict considerable damage to fruit, bark, and foliage. But there have not been any recorded complaints of damage to commercial or food crops (Anderson, Jones et al. 1984).

Jamaican hutias are still used as a food source by local peoples. They are widely hunted by means of traps or dogs (Parker 1990).

Positive Impacts: food