They mostly eat vegetation like tree leaves or smaller plants.

I eat plants and bark from high up in trees.

Others believe they should eat only plants that spread seeds when the plant is eaten.

This means they eat only meat (such as fish or squid) and not plants.

In order to obtain energy they eat plants or other heterotrophs.

"Let's make them strong enough to do all the work themselves, and have them just eat plants."

At night, they feed on invertebrates and will also eat plants.

A few types of birds eat green plants, but only one species lives on leaves.

And they also have gotten very useful for eating invasive plants.

"They see a group of people eating plants and they go the other way."