Lemurs are a type of prosimian, which means they are primates that evolved before monkeys and apes. They are more primitive than their cousins but share certain characteristics. Although there are 98 different species of lemurs, they are found only in Madagascar and the nearby Comoro Islands, and all the species are critically endangered. In some species, males and females have different coloring. For example, blue-eyed black lemur males are solid black while the females are reddish-brown. The primary predator of lemurs is the fossa, although they can fall prey to large boas, harrier hawks, and introduced species, as well.