• Black Howler Monkey

    Alouatta pigra

    Howler Monkey


    • Least concern


    • Argentina, Bolivia, Brazil, Paraguay, and Uruguay


    • Body: 22-36 inches
    • Weight: 15-22 pounds
    • Tail Length: 23-36 inches


    • Temperate, tropical, terrestrial regions


    • Females can breed once every 22 months, but breeding can happen all year round
    • Gestation period is 6 months long


    •  Leaves, fruits, flowers


    • Their impressive howls are often mistaken for roars of lions. Their howl can be heard over two miles away
    • The average lifespan is 15-20 years
    • Their biggest predators are ocelot, black hawk eagle, and feral dogs
    • Howler monkeys are arboreal and diurnal; generally howlers spend over half of their waking hours resting to conserve energy for feeding
    • They use high-amplitude calls to minimize predation, control access to resources, and for mating
    • Howlers play a significant role in dispersing the seeds or pits of a variety of plant species
    • The species’ populations are extremely fragmented and reduced due to habitat destruction and development in the coastal forests of south-eastern Brazil and north-eastern Argentina


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