AT A GLANCE
- Common Name: Bemaraha Woolly Lemur
- Scientific Name: Avahi cleesei
- Category: Mammals
- Subcategory: Primates
- Range: Western Madagascar, strictly endemic to the limestone karst formations of Tsingy de Bemaraha National Park in the Melaky region
- Habitat Type: Tropical dry deciduous forests growing amidst razor-sharp limestone karst pinnacles (tsingy) and deep canyon gorges
- IUCN Red List Status: Critically Endangered
- Lifespan: 10 to 14 years
- Diet: Folivorous (specialized nocturnal consumption of young tender leaves, buds, and select dry forest foliage with low tannin concentrations)
- Average Size/Weight: Head-and-body length 25 to 30 cm; tail length 30 to 35 cm; weight 750 to 1,000 g
- Key Defining Feature: Nocturnal, thick-furred woolly lemur with large reddish-brown eyes, a pale facial mask with an inverted chevron on the forehead, and a specialized vertical clinging and leaping posture
Overview
The Bemaraha Woolly Lemur (Avahi cleesei), also known as Cleese’s Woolly Lemur, is a rare and critically endangered strepsirrhine primate in the woolly lemur family Indriidae. Named in honor of the British comedian and conservation advocate John Cleese for his efforts to protect Malagasy wildlife, this nocturnal, leaf-eating primate is confined entirely to the otherworldly, razor-sharp limestone labyrinth of Madagascar’s Tsingy de Bemaraha. Clinging vertically to spiny tree trunks amidst vertical stone blades, it represents one of the most specialized lemurs on the island.
Biology and Physical Characteristics
Avahi cleesei has a dense, soft, woolly coat that ranges from greyish-brown to creamy-buff across the back and shoulders, with lighter underparts and a reddish-brown tail. Its round head features small ears almost completely buried within its thick fur and prominent, nocturnal, luminous hazel-brown eyes surrounded by pale fur, creating a mask-like facial appearance with an unmistakable dark, inverted V-shaped mark running down the forehead to the bridge of the nose. Its elongated, muscular hind limbs are adapted for vertical clinging and leaping, while its digestive tract possesses an enlarged, specialized caecum to ferment fibrous leaves.
Behavior and Ecology
Exclusively nocturnal, Bemaraha Woolly Lemurs live in small, monogamous family units consisting of an adult pair and one or two dependent offspring. During daylight hours, the family huddles together in a dense ball of fur, sleeping in tangled vine thickets or shaded limestone clefts to evade hawks and fossas. When night falls, they awaken and move gracefully through the dry forest canopy, executing silent, vertical leaps between spiny tree trunks and towering karst walls while feeding delicately on young leaves.
Conservation and Human Impact
The Bemaraha Woolly Lemur is listed as Critically Endangered on the IUCN Red List. Its global range is restricted to a few hundred square kilometers within Tsingy de Bemaraha. While the formidable, impassable razor-stone karst terrain provides natural protection against logging and agriculture, illegal slash-and-burn fires (tavy) along forest borders and the severe impacts of climate change threaten this fragile micro-endemic population.
Interesting Factoid
The Bemaraha Woolly Lemur was named after Monty Python comedian John Cleese, who fell in love with Madagascar’s lemurs and dedicated years to raising money to protect their wild forest homes.