Yellow-throated Marten in Bhutan

The yellow-throated marten (Martes flavigula) is the largest extant species of marten and one of the most distinctive small carnivores of the South and East Asian forests. It is unmistakable in the field: a long, lithe body around 50 to 70 centimetres long with an additional long bushy tail, dark-brown head and limbs, a paler chestnut-brown back and a striking pale-yellow throat and chest patch that gives the species its name. The species is assessed as Least Concern on the IUCN Red List, on the basis of a very wide global range from the Russian Far East and Korea south through China and Southeast Asia and west along the Himalaya to Pakistan.^[1][2]

In Bhutan the species is widely distributed and is one of the most frequently encountered forest carnivores in the country. It is recorded across most of the national park and wildlife sanctuary network — including Jigme Dorji National Park, Royal Manas National Park, Jigme Singye Wangchuck National Park, Wangchuck Centennial National Park and Sakteng Wildlife Sanctuary — and from territorial forest divisions outside the protected area system. Bhutan-specific population figures have not been published; Bhutanese camera-trap surveys conducted as part of the national tiger and snow-leopard programmes routinely record the species but have not produced a country-level abundance estimate.^[3][4]

This article covers identification, the species' Bhutanese distribution and habitat, behaviour and ecology, ecological role and conservation status.

Identification

The yellow-throated marten is the largest of the world's martens, considerably larger than the European pine marten or the American marten. Adults weigh between 1.5 and 6 kilograms. The pelage is a striking combination of dark-brown crown, ears and limbs, chestnut-brown back, and a yellow to creamy-white throat and chest. The tail is long, bushy and dark, often held in a horizontal trailing posture in flight. The species is diurnal — unusually so for a small carnivore — and is therefore observed by visitors and researchers with a frequency disproportionate to its abundance.^[2][5]

Distribution and habitat in Bhutan

Bhutanese records place the species across an unusually wide elevational range, from the southern foothills below 200 metres to the upper subalpine zone above 3,500 metres. The species is recorded routinely from broadleaf forest, mixed temperate forest, conifer-rhododendron forest and the forest-shrub ecotone of the upper treeline. A 2018 camera-trapping survey in the Gedu Territorial Forest Division of western Bhutan documented the species among five small carnivore species recorded during the operation, indicating that distribution is not confined to the protected area system.^[6]

The species' broad habitat tolerance, in combination with Bhutan's 71 per cent forest cover, contributes to the perception of the yellow-throated marten as one of the most easily observed forest carnivores in the country, particularly along trekking routes through Jigme Dorji and Wangchuck Centennial National Parks.^[3][4]

Behaviour and ecology

The species is unusual among small carnivores in being primarily diurnal. It is also unusual in often hunting in pairs or small groups of three or four animals — a behaviour interpreted as cooperative pursuit of larger prey such as muntjac fawns or pheasants. Single animals also occur, especially during dispersal. Home ranges are described as large but not strictly defended; individuals have been documented covering 10 to 20 kilometres in a single day-night activity period.^[2][7]

The diet is broad and opportunistic. Items recorded across the species' range include small mammals (rats, voles, hares, squirrels, pikas), ground-nesting birds (pheasants, partridges, francolins), eggs, reptiles, large invertebrates, fruit, honey and bee larvae. Larger prey, including occasional musk-deer fawns and goral kids, has also been documented. The capacity to take prey of the size of a young ungulate makes the yellow-throated marten an unusually capable forest predator for its body size.^[2][7]

Ecological role

The species occupies an unusual ecological position in Bhutan's forest carnivore community: a mid-sized, diurnal, partly arboreal omnivore that overlaps with the activity periods of larger nocturnal predators such as the common leopard. Because it is one of the few day-active carnivores of substantial size in the country's forests, it is over-represented in visitor and naturalist sightings relative to its actual abundance, and it is a regular subject of camera-trap photographs from across the protected area network.^[3][6]

Conservation status

The species is assessed as Least Concern on the IUCN Red List, with no major global threats identified. Local pressures across the species' wider range include hunting for fur, accidental capture in snares set for other species, and habitat loss. In Bhutan, hunting and snaring are prohibited under the Forest and Nature Conservation Rules and Regulations, which protect all wild carnivores. The species is not separately treated in published Bhutanese conservation programming, reflecting both its broad distribution and its currently low conservation priority relative to species such as the snow leopard, the tiger and the red panda.^[1][8]

References

1. Martes flavigula — IUCN Red List
2. Yellow-throated marten — Wikipedia
3. Wildlife camera trapping in the Himalayan Kingdom of Bhutan — review
4. Yellow-throated Marten — Mammals of Bhutan, iNaturalist field guide
5. Martes flavigula species account — Animal Diversity Web, University of Michigan
6. Camera-trap records of small carnivores from Gedu Territorial Forest Division, Bhutan
7. Yellow-throated marten species page — Thai National Parks
8. Forest and Nature Conservation Rules and Regulations of Bhutan, 2023