The red howler are found only in neotropical South America in places like Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Perú, Suriname, Trinidad and Tobago, and Venezuela.

They extend from northwest Colombia east and south to the Amazon River in eastern Brazil.

Red howler monkeys have a muscular, prehensile tail that enables them to grasp branches or even swing from them.

They feed mostly on leaves and they also enjoy nuts, seeds, fruit, and flowers.

After the pregnancy period, which is six months, the female generally gives birth to one offspring at a time.

They howl again at night, before they go to sleep, and the calls are answered by males from other red howler groups, to let them know their location so that their territories do not overlap.

They have about six species of red howler in Central and South America, and they sleep for 15 hours per day.