A reader recently wrote to us about a big green caterpillar with distinct body segments, body segments that make the caterpillar look like the Michelin Man, to give our reader’s comparison. He included an excellent picture of the caterpillar he found in his yard with his email, which contained a number of terse, difficult-to-decipher bits of information. From what we can gather, the reader is wondering what the big green caterpillar is, and he is also wondering if it is responsible for some of the lawn problems he has been experiencing. So, we are tasked with identifying the caterpillar and investigating whether this type of caterpillar can do damage to your yard.