Tobacco Hornworm Caterpillar
Ijams Nature Center (Knox Co.)
Although this is a Tobacco Hornworm, it is eating a tomato plant leaf! There is also a Tomato Hornworm that looks very similar. The red horn at the end of the abdomen on this Sphinx moth larva is a good identification tool. Note the large circular spiracles, the "breating holes", on the side of the abdomen. The 5 large, visible green legs are the prolegs, the 6 true legs are beneath the caterpillar's tucked head and can't be seen.