Both species usually are solitary foragers, although the northern giant mouse lemur tends to be the most social, possibly due to its higher population density.
The gray mouse lemur tends to prefer lower levels of the forest and the understory, where branches and vegetation are dense.
Since grey mouse lemurs, and particularly those under winter phenotype, tend to overfeed when isolated and thus gain mass during the ad-libitum period, energy intake was clamped to the level required to stabilize their body mass.
In addition, the gray mouse lemur in secondary forests tend to have a lower body mass than those in primary forests, as well as lower survival rates.
Madagascar is the world's only home to about 40 species of lemurs, including two previously known species of mouse lemurs.
(Mouse lemurs live only in Madagascar and the Comoros Islands).
Exceptions are mouse lemurs (Microcebus), gentle lemurs (Hapalemur), and ruffed lemurs (Varecia), which bear more helpless (altricial) infants and carry their young in their mouth.
Scientists working in Madagascar have discovered three previously unknown species of mouse lemurs, the world's smallest primate.
The lodge also offers night hikes, which provide perhaps the only chance to see mouse lemurs.
Within Lemuriformes, it belongs to the family Cheirogaleidae, which contains the mouse lemurs, dwarf lemurs, giant mouse lemurs, fork-marked lemurs, and hairy-eared dwarf lemur.
