Lemur Fact Sheet: Indri

Scientific Name: Indri indri

Weighing 6-9.5kg, the Indri is the largest living lemur species. Indris are diurnal, which means they are active during the day. They are easily identified by their loud, haunting calls used to maintain territory.

Diet

Indris are folivores, eating mostly immature leaves. They also eat flowers, fruit, seeds, and bark, and occasionally descend from the trees to eat soil. Scientists think they may use soil to reduce toxins in seeds they eat.

Family

Indris live in groups of 2-6 individuals (monogamous pairs and their children). Like most lemur species, Indris are female dominant. However, unlike other species, Indris do not reach reproductive maturity until 7-9 years of age, and females only give birth every 2-3 years! This slow reproductive rate makes it difficult for Indri populations to grow.

Geographic Range

Indris are found in tropical moist lowland and montane forests of eastern Madagascar. Their geographic range extends from the Anosibe an’ala Classified Forest in the south to the Anjanaharibe-Sud Special Reserve in the north (not including the Masoala Peninsula).

Conservation Status

Indris are classified as Critically Endangered on the IUCN Red List. Their numbers are decreasing, and the overall population is severely fragmented. Individuals cannot easily reach each other to reproduce, usually because the forest itself is fragmented. These “holes” in the Indris’ habitat make it difficult for them to maintain and grow their numbers.

Threats

The main threats to Indris are habitat destruction from slash and burn agriculture, logging, and fuelwood gathering for charcoal production. Poaching is also a major issue. Fady (traditional beliefs/taboos) that once protected Indris from being hunted by locals are becoming less respected. This has led to an increase in hunting, especially since the political crisis in Madagascar that began in 2009.

LCN Members Working to Save Indris

Where to Indri In Madagascar

Analamazaotra Special Reserve and Association Mitsinjo Reserve, both in Andasibe
Anjozorobe-Ankavo, about 90 minutes from Antananarivo
Anjanaharibe-Sud Special Reserve, about 15km southwest of Andapa
Zahamena National Park and Strict Nature Reserve
Marotandrano Special Reserve