The genus Avahi is a group of primates commonly known as woolly lemurs or avahis. They are arboreal and nocturnal, and are endemic to Madagascar. The genus Avahi consists of six recognized species, including Avahi cleesei, Avahi laniger, Avahi mooreorum, Avahi peyrierasi, Avahi ramanantsoavanai, and Avahi unicolor. The woolly lemurs have a distinctive appearance, with thick fur and a long tail used for balance. They are an important part of Madagascar's biodiversity, and are threatened by habitat loss and hunting. Synonyms for the genus Avahi include woolly lemur, Madagascar woolly lemur, and avahi lemur.