Smaller lemurs eat more insects. Different lemurs also specialise in different food. The Gentle Lemurs eat bamboo and other tough vegetation and have serrated teeth to deal with this food. Other lemurs eat a wider range of food. Most large lemurs are diurnal, being more active in the early morning or evening rather than at midday.
Smaller ones are nocturnal.
With a nose structure similar to a dog's, a lemur has a better sense of smell than most primates. Indeed, smell is an important feature in a lemur's social life and many lemurs have scent glands used to intimidate or flirt with other lemurs. But like other primates, lemurs also have good binocular vision, i.e., they can judge distance well. Both the thumb and big toe are enlarged and opposable. But lemur don't use their hands to prepare food or even to put food into their mouths, although they use their hands to bring branches near their mouths.