Are you still identifying caterpillars? I found this strange looking caterpillar on my lemon tree. We live in Southern California, about 25 miles inland from San Diego. My daughter thought it looked like a bird dropping! It’s about 3 inches long and sort of has a face. Thanks,
The caterpillar of the beautiful Giant Swallowtail is sometimes called the Orange Dog. They do look like bird droppings.