 Social systems of "M. berthae" are more similar to the grey mouse lemur ("Microcebus murinus") than the fat-tailed dwarf lemur ("Cheirogaleus medius"), i.e.Madame Berthe's mouse lemur is sexually promiscuous rather than monogamous.The range in distance of males is larger than that of the females in both Microcebus species, both before and after mating seasons.