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(Tarsipes spenserae), also honey mouse, a mammal of the order Marsupialia. The body length is 7–8 cm, the tail length is 9–10 cm, and weight is 13–17 g. The honey possum is gray-brown, with three dark stripes along the back. The tail is naked and prehensile. The first digit of each limb is opposable to the remaining digits. An arboreal and nocturnal animal, the honey possum is found in the forests of southwestern Australia. It feeds on insects, honey, and flower nectar. A litter contains as many as four young.