Turtles have a long fossil history. Most are carnivorous, but some eat plants as well. Snapping turtles are the most dangerous because they are aggressive and will bite. Don't mess with 'em! Soft-shell turtles look harmless but also bite. Box turtles are the most common in the garden and can be helpful in eating insects, slugs, and snails. They also like the taste of strawberries and other low-growing fruits and vegetables, so they can become pests, especially in the vegetable garden.