Subject: What is this
Geographic location of the bug: Mobile, AL
Time: 07:34 PM EDT
Your letter to the bugman: Any idea what this is? Found on a lemon tree
How you want your letter signed: Laura
This is the Caterpillar of a Giant Swallowtail, commonly called an Orange Dog. It will eat some leaves, but it will not negatively affect the health of your tree. Unless there are hundreds of them or the tree is very very small, the tree can stand to lose a few leaves.