[4] Mouse lemurs have a combined head, body and tail length of 20–30 centimetres (7.9–11.8 in) and weigh 30–65 grams (1.1–2.3 oz),[5] making them the smallest primates[6] (the smallest species being Madame Berthe's mouse lemur); however, their weight fluctuates in response to daylight duration.

[9] Mouse lemurs are omnivorous; their diets are diverse and include insect secretions, arthropods, small vertebrates, gum, fruit, flowers, nectar, and also leaves and buds depending on the season.

[11] As written in Genetics, mouse lemurs help to provide a more extensive understanding of the biology, behavior, and health of primates.

These tiny creatures are helping to prove valuable information about the biology and evolution of primates through the analysis of their phenotypes and mutations, especially as a model organism for human medical research.

[14] Analysis of the genomes of five different mouse lemur species revealed that Madagascar's biogeography had been undergoing change before the arrival of humans.