Have you seen a moth that flies like a hummingbird? It is likely a “hornworm,” and are also are known as hawk, sphinx, or hummingbird moths. There are dozens of species found in Wyoming and they are among the largest of caterpillars, measuring up to ½ around and up to 4” long. Many have the characteristic horn. Most do little harm to crops and are fun to watch and help with some plant pollination.
However, the tomato hornworm species can do significant damage in a short amount of time in the garden. Look for larges holes in the leaves and you can’t miss the caterpillar with a horn on one end doing the eating. These caterpillars can be easily handpicked off plants (a great job for bug-loving kids).