Are caimans herbivores?

A caiman is any member of several species of South and Central American reptiles of the alligator family. Just like any crocodile order caimans are amphibious, lizard like carnivores.

No. Herbivores eat only plants which is why they are called herbivores. A creature that eats plants AND meat is considered omnivorous (an omnivore).

A raccoon is an omnivore because it could eat fish and it could eat berries.

Most humans are not herbivores because most humans eat both meat and plants. That makes those people omnivores. People that do not eat meat are vegetarians, or herbivores. :)

A relative of the crocodile.