Mona is a subtropical dry forest island about 41 miles (66 kilometers) west of Puerto Rico. The island is characterized by a flat central plateau, known as the Mona Plateau, that is surrounded by steep, sometimes sheer, cliffs on the north and a coastal plain on the west, south and east sides. Much of the plateau is covered by out-crops of bedrock limestone, which are interspersed with tracts of sea grape scrub/shrub in the coastal plain and small to medium-sized deciduous trees, with small, succulent leaves and thorns, or spines, on the plateau. Within this habitat, boas may be found at heights of more than six meters in large trees or at ground level crawling among limestone boulders.

Mona boas are thought to prey largely on lizards of the genus Anolis. The greatest concentrations of boas have been documented in areas with high prey densities, particularly in areas of Anolis cristatellus lizards, that sleep on tree branches. Adult Mona boas are also able to feed on rats, mice and small birds, like the yellow warbler (Dendroica petechia). Juvenile and sub-adult snakes prey primarily upon the smaller Mona island anole (Anolis monensis) and Mona coqui (Eleutherodactylus monensis).

This species is much more slender and smaller than the Puerto Rican boa (Epicrates inornatus). The scientific community is of the opinion that this snake has always been rare or uncommon.

Measurements
Length: 39 in (1 m)

The Mona boa is light brown dorsally, with a series of darker brown dorsal irregular blotches that are bordered in black and white ventral parts, with scattered brown stippling. Immature individuals are light yellowish-brown, with dark brownish markings dorsally and creamy undersides.

Not much is known about the Mona boa life cycle.

Not much is known about the life span of this species, but there is a record of a Mona boa reaching 11 years in captivity.

Not much is known about the reproduction of Mona boa. They are known to reach sexual maturity when reach about 800 millimeters (0.8 meters) in length. Also, unlike other snake species, the Mona boa does not lay eggs. It actually gives birth to fully developed offspring.

Virgin Islands boa, Chilabothrus granti, also known as Epicrates monensis grantii.

Not much is known about the day-to-day behavior of the Mona boa. Being mostly nocturnal, it is difficult to determine its activity during the day. It is known that they are found in the large bromeliad Tillandsia utriculata, because these large plants are also important refuges for the Mona anole and Mona coqui. These bromeliads can be found growing on large trees, or on the ground throughout the Island plateau. Also, they seem to prefer the tree Ficus citrifolia, a type of banyan tree, as well as Clusia rosea or the cupey tree. Both have a variety of three-dimensional structural features, like compound trunks, spreading crowns and aerial roots, that greatly increase the space available to the boas for foraging or travel through the canopy.