An observation of Malay Weasel Mustela nudipes in Gunung Mulu National Park (Sarawak, Malaysia) with a comment on discriminating this species from sympatric orange mongooses Herpestes

Malay Weasel Mustela nudipes, restricted to Sundaic Southeast Asia, is currently not considered globally threatened. Little is known about its abundance, ecology and behaviour, and it is typically recorded rather infrequently across its range. A 20-second observation from Gunung Mulu National Park, Sarawak, on the island of Borneo is here used to speculate on the species’s behaviour. Physical and behavioural characteristics to differentiate Malay Weasel from sympatric orange-coloured mongooses Herpestes, particularly involving suboptimal field observations or camera-trap photographs, are suggested.