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BiologyAs an inhabitant of a remote and poorly studied region of the world, very little is known about the ecology of the pygmy scaly-tailed flying squirrel, other than largely anecdotal accounts from chance encounters (3). It is certainly inactive during the day, passing the sunlit hours sheltering in hollow trunks and branches as much as 40 metres above the ground and in colonies of up to 100 individuals (3) (6). In contrast, during the night it is extremely energetic and may travel several kilometres to feed, climbing to the tops of trees, leaping off and gliding down to the trunk of another tree which in turn is ascended. With an impressively slow-rate of descent it is reportedly able to travel more than a 100 metres in a single glide (3) (5) (6) (7). Considered to be primarily herbivorous, the pulp of oil palm fruits is thought to be its main food source but it may also occasionally consume insects and possibly nectar (5) (6). Other than reports of female pygmy scaly-tailed flying squirrels leaving the colony to bear a single young, nothing is known about its reproductive biology (7). In other Anomalures, the female has two litters of one to three young per year, which at birth are active, have a full body of fur and open eyes (6) (7).