Here are some examples of herbivores:
* Mammals: Cows, horses, deer, rabbits, elephants, giraffes
* Birds: Chickens, ducks, parrots, hummingbirds
* Insects: Grasshoppers, caterpillars, butterflies
* Fish: Some species of fish that eat algae
Herbivores have specialized digestive systems that allow them to break down and extract nutrients from plant matter. They often have teeth adapted for grinding tough plant material, and their digestive systems contain bacteria that help them digest cellulose, a complex sugar found in plants.