two young. These are weaned after about four months (if the food supply is ample) and are fully mature at two years of age. Their life expectancy is up to 12 years. Cyanide Consumption Not all bamboo contain cyanide, but H. aureus selects the growing tips of Cephalostachyum viguieri, which contain 15 mg of cyanide per . Other bamboo lemurs have been found to consume less cyanogenetic forms of bamboo, such as mature shoots of C. viguieri or the leaves of Cephalostachyum perrieri. How certain bamboo lemurs can detoxify the high amounts of cyanide in their diets is unknown. Classification As of 2010, the classification of bamboo lemurs lists five species and three subspecies. The greater bamboo lemur was removed from this genus in 2001 to Prolemur but was restored in 2016. Genus Hapalemur Eastern lesser bamboo lemur, H. griseus Eastern lesser bamboo lemur, H. g. griseus Gilbert's bamboo lemur, H. g. gilberti Ranomafana bamboo lemur, H. g. ranomafanensis Southern lesser bamboo lemur, H. meridionalis Western lesser bamboo lemur, H. occidentalis Lac Alaotra bamboo lemur, H. alaotrensis Golden bamboo lemur, H. aureus Greater bamboo lemur, H. simus References External links Primate Info Net Hapalemur Factsheets Conservation of the Alaotra Gentle Lemur - by Madagascar Wildlife Conservation