EN

Greater Marmoset Rat

Hapalomys longicaudatus

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Hapalomys longicaudatus faces severe population decline primarily due to extensive deforestation and habitat fragmentation across its Southeast Asian range. Agricultural expansion, particularly oil palm plantations and rice cultivation, has eliminated vast areas of the lowland and hill forests this species requires. Logging operations continue to degrade remaining forest patches, while urban development fragments critical habitat corridors needed for population connectivity.

Threat summary

Habitat

This arboreal rodent inhabits primary and secondary tropical forests, including lowland dipterocarp forests and hill forests up to 1,500 meters elevation. It shows preference for dense canopy areas with abundant fruiting trees and maintains territories in both undisturbed primary forest and selectively logged secondary growth.

Forest - Subtropical/tropical moist lowland· major

Conservation measures underway

Site/area protectionSpecies recovery

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Frequently asked questions

Why is Greater Marmoset Rat classified as Endangered?
Greater Marmoset Rat is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Hapalomys longicaudatus faces severe population decline primarily due to extensive deforestation and habitat fragmentation across its Southeast Asian range. Agricultural expansion, particularly oil palm plantations and rice cultivation, has eliminated vast areas of the lowland and hill forests this species requires. Logging operations continue to degrade remaining forest patches, while urban development fragments critical habitat corridors needed for population connectivity.
Where does Greater Marmoset Rat live?
Greater Marmoset Rat occurs in China, Malaysia, Myanmar (Burma), and Thailand. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Greater Marmoset Rat?
The main threats to Greater Marmoset Rat are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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