There are all sorts of creepy crawlies that want to snack on your prized plants. Predatory thrips in gardens and interior plantings can help protect your babies from other species that wreak havoc on their productive abilities. What are predatory thrips? They are a very tiny insect in a family of primarily plant eaters. The predatory thrips, however, are good guys. They eat the bad thrips that are munching away on vulnerable plant parts.