There are nine species of Howler Monkeys found in the Amazon Rainforest. This article describes the Black Howler Monkey. The male Howler Monkey is entirely black while female and young Howler Monkeys are gray or tan. Howlers have a long prehensile tail and short snout. Howler Monkeys are the loudest land animal on earth. Their howling calls can be heard from three miles away and are used to declare territories. They vary in size and can weigh from 8 to 22 pounds.
Howler Monkeys live in “troops” of 4 to 18 individuals. Each troop maintains its own territory which ranges from 3 to 25 acres. Howler Monkeys have a 30 inch long tail, which helps this acrobatic mammal swing from branch to branch and balance itself among the tangles of the rainforest canopy. Howler Monkey troops are led by a dominant male which will kill all infant monkeys when it takes over (so females will mate with him). Howler Monkeys are among the least active of all moneys and spend up to 80% of their time resting in the branches.
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