Most herbivores I’m aware of will at least occasionally eat meat or insects. Even grazers. I would be kind of surprised if there’s any “true and pure” herbivor

Most herbivores I’m aware of will at least occasionally eat meat or insects. Even grazers. I would be kind of surprised if there’s any “true and pure” herbivorous vertebrate. Meat is rich in nutrients that even herbivores need and is difficult to get entirely from plants. Vegans are the anomaly.