Red-handed Howler Monkey (Alouatta belzebul) lives in tropical rainforest across Eastern South America. It feeds on leaves and fruits. Its conservation status is Vulnerable.
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Fascinating facts about the Red-handed Howler Monkey
The red-handed howler is instantly recognisable by its vivid red hands and feet contrasted with a black or dark brown body coat. Most adults display this pattern, yet the species shows notable colour variation; some individuals are completely black, mimicking the Amazon black howler, while others appear reddish or fall somewhere between these extremes. This variability in fur colour does not affect their classification but adds to their distinctive appearance.
Adult male red-handed howlers are relatively large for New World monkeys, typically weighing between 7 and 9 kg. Their head-body length is about 90 cm, giving them a robust silhouette in the forest canopy. Males are noticeably larger than females, a clear example of sexual dimorphism that influences group dynamics and breeding roles within their social units.
When not actively foraging, red-handed howlers select the upper reaches of mature trees, perching roughly 20 m above the forest floor to rest and scan their surroundings. They do this in cohesive social groups that usually number between seven and twelve individuals, often comprising one or two mature males together with females, juveniles and infants. This arboreal resting habit provides safety from ground predators and a platform for their loud territorial calls.
Newborn red-handed howlers are held against the mother's belly for the first three weeks of life, after which the mother moves the infant to her back as it becomes a little larger. This short ventral-carry phase is only seen in mothers that have previously raised young, indicating a learned component to infant handling. Births that have been observed are rapid and silent, occurring in the daytime when the group is active, which helps minimise disturbance.
The red-handed howler occupies one of the tiniest geographic ranges of any howler monkey, being confined to fragmented forest patches in Brazil's southeastern Amazon and the Atlantic Forest between Rio Grande do Norte and Sergipe. This limited, disjunct distribution means populations are isolated and the species is especially vulnerable to habitat loss and other threats.
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In the lush canopy of the tropical forest, the red-handed howler monkey moves with deliberate intent, its robust frame navigating the intricate network of branches with ease, as if drawn by an invisible thread. With a deep, resonant bellow that echoes through the trees, this majestic creature announces its presence, a primal call that sends shivers through the air, a testament to its unyielding vitality. As it swings effortlessly from limb to limb, the golden light of dawn dancing across its rust-hued fur, the red-handed howler monkey embodies the very essence of its domain, a true monarch of the forest realm.
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