Overview
The Amami Rabbit (Pentalagus furnessi), known in Japan as ‘Amamino kuro-usagi,’ is a primitive, dark-furred lagomorph surviving strictly on two small subtropical islands in the Nansei Archipelago of southwestern Japan. Often heralded as a ‘living fossil,’ this secretive nocturnal creature represents an ancient branch of the rabbit family that diverged in mainland Asia during the Miocene epoch, remaining virtually unaltered in morphology for millions of years.
Biology and Physical Characteristics
Pentalagus furnessi exhibits distinct anatomical traits that separate it sharply from modern open-country hares. It features remarkably short ears, diminutive eyes suited to nocturnal understory navigation, and thick, woolly dark-brown to black pelage. Its stout forelimbs are armed with unusually long, heavy curved claws measuring over an inch in length, engineered for excavating deep burrow networks in compacted forest soils and tearing apart rotting timber to reach edible fungal shoots.
Behavior and Ecology
The Amami rabbit is strictly nocturnal and solitary, emerging after dusk to forage along mossy forest floors, abandoned logging trails, and stream embankments. Unlike most rabbits, it communicates using vocal calls, emitting sharp, metallic clicking sounds and soft whistles to signal conspecifics. Mothers dig specialized nursery burrows up to six feet deep away from their living dens, sealing the entrance with dirt and vegetation after nursing each night to protect their single kit from native venomous habu pit vipers.
Conservation and Human Impact
Historically threatened by commercial clear-cutting of old-growth laurel forests, the Amami rabbit was pushed to catastrophic lows by invasive small Indian mongooses and feral cats introduced in the late 20th century. Following an aggressive, decades-long mongoose eradication campaign orchestrated by Japan’s Ministry of the Environment and designated World Natural Heritage protection, populations have steadily stabilized. Ongoing challenges include traffic collisions along mountain roads and localized feral dog predation.
Interesting Factoid
The mother Amami rabbit visits her nursing burrow only once every two nights; after feeding her kit for 30 minutes, she carefully plugs the burrow mouth with packed dirt using her front paws to hide her baby from predators.
Last updated: October 2026