The ones that feed only on fruits are called frugivores.
The animals that feed on leaves are called folivores.
Herbivorous animals that feed on woods are called xylophages.
Nectivores are herbivores that feed on nectar. E.g. Butterflies
The seed-eating herbivorous animals are called granivores. E.g. Pigeons
The herbivorous animals transport photosynthetic energy in the tropics system.