User blog comment:Lord Loss/Discussion of the Week: Brute Wyverns/@comment-4280660-20130116044444/@comment-5853890-20130116191658

Herbivores means plant-eaters, so its diet has to be completly entirely of plants and veges. Insect eaters and geovores don't count, just because they don't eat meat doesn't mean they are herbivores.

As for Diablos, I'm not really sure if he is a herbivore. I mean with his attutide he maybe an onivore. (Yes I know that he eats plants, but he is literally far too aggressive for a herbivore. It's like feeding jho with lettuce.)