Animals in zoos need a diverse range of food. 

A zoo needs to cater for:

• herbivores (grass eaters such as rhinoceroses and tapirs);
• folivores (foliage eaters such as giraffes); 
• frugivores (fruit eaters such as lemurs); 
• carnivores (meat eaters such as lions and lynxes); 
• piscivores (fish eaters such as penguins); 
• omnivores (all types of food eaters such as baboons); 
• granivores (grain eaters such as weaver birds); 
• insectivores (insect eaters such as anteaters); 
• nectarivores (nectar eaters such as fruit bats); and so on.