Overview
Walston’s Tube-nosed Bat (Murina walstoni) is an enigmatic microbat discovered in 2011 during comprehensive biological surveys of the Greater Mekong region. Named in honor of mammalogist Joe Walston, this diminutive flyer belongs to the specialized subfamily Murininae, renowned for peculiar tubular nostrils protruding horizontally from the snout. Inhabiting dense tropical forest understories across Cambodia, Laos, and Vietnam, this secretive bat represents one of many extraordinary cryptic mammals emerging from Southeast Asia’s biologically rich yet threatened river basins.
Biology and Physical Characteristics
Walston’s tube-nosed bat possesses remarkable morphological adaptations suited for cluttered forest navigation. Its defining feature is a pair of elongated, tube-like narial protuberances that extend outward from the tip of the muzzle, believed to assist in directional olfaction and acoustic funneling during echolocation. Its dorsal pelage is dense, woolly, and striking, featuring pale golden-brown hairs tipped with rufous highlights, contrasting sharply against a clean white venter. Broad, rounded wing membranes grant exceptional low-speed agility and hovering capability through tangled undergrowth.
Behavior and Ecology
Highly specialized for aerial hawking and substrate gleaning, Murina walstoni emerges at dusk to hunt beneath the dense forest canopy. It emits high-frequency, broadband frequency-modulated (FM) echolocation calls that allow it to detect tiny insects perched motionlessly on wet leaves or hovering amidst dense bamboo stands. Unlike cavernous colonial bats, tube-nosed bats roost solitarily or in mated pairs within dead curled banana leaves, hanging epiphytes, or hollow bamboo stems, relying on their mottled fur for camouflage against dry foliage.
Conservation and Human Impact
Currently evaluated as Data Deficient by the IUCN, Walston’s tube-nosed bat remains vulnerable to the intense anthropogenic pressures impacting Indochina’s lowland forests. Rapid commercial logging, expansion of rubber and acacia plantations, and hydroelectric development along tributary valleys fragment its specialized roosting microhabitats. Enhancing transboundary protected area corridors and conducting acoustic monitoring in remote reserves are crucial to safeguarding viable populations.
Interesting Factoid
The distinctive tubular nostrils of Walston’s tube-nosed bat act almost like miniature snorkel tubes, which researchers believe may allow the bat to breathe comfortably while tightly wrapped inside curled jungle leaves during tropical downpours.
Last updated: October 2026