Behavior

Monitos del monte are nocturnal and active most of the year in milder parts of their range. However, prolonged periods of cold winter weather or food shortage induce hibernation during which the animals survive on reserves of fat stored in the base of the tail. They spend most of their life above-ground, climbing with great skill using hands, feet, and tail to grasp branches and stems. They build intricate but sturdy nests of twigs and bamboo leaves woven into a ball. Preferred nest sites are tree holes or dense thickets, but rocky crevices and hollow fallen logs are also used, and nests are sometimes built suspended aboveground in trailing liana vines. The bamboo leaves with which the nests are made are waterproof, so the lining material of soft moss and grass remains dry and snug. Mosses are also sometime used to adorn the outside of the nest as well, helping to make it less conspicuous.

Individuals typically live in pairs or in small groups that usually comprise a mother and up to four young of the current year. Neighbors and family members communicate by sound; the most distinctive call is a long, trilling sound ending in a soft, hoarse cough.

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