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Mouse Lemur

Microcebus

The world's smallest primates, mouse lemurs have unusual reproductive adaptations including seasonal vaginal closure.

Vital Stats

🏷️ TypePrimate (strepsirrhine lemur)
🌍 Found InMadagascar — tropical and subtropical forests
📏 Size9-14cm body, 30-80g
⏳ Lifespan6-8 years in wild, up to 15 in captivity
🔞 Sexual Maturity1-2 years
💕 Mating SystemPromiscuous — scramble competition among males
📅 Mating SeasonSeptember - October (austral spring)
🤰 Gestation54-68 days
👶 Offspring1-4 per litter
🍆 Penis Size1 cm
⏱️ Sex Duration30 seconds
🔬 Notable AnatomyFemales develop a vaginal closure membrane outside of breeding season
⚖️ Sexual DimorphismMinimal; males have larger testes relative to body size

1 Fact about Mouse Lemur

Sealed Shut Until Mating Season

Mouse lemurs and dwarf lemurs develop a membrane that seals their vaginal opening completely closed outside of breeding season.