my nephews found this in our back yard today and i have no idea what it is...its huge.....please someone tell me what it is and if its harmful in any way...thanx Kat
CLOSED: green caterpillar
Whatever butterfly that turns into, I'm sure he won't eat much. I say share.
It's hard to tell from your picture but.... big and green makes me think of tomato & tobacco hornworms. There's also some really beautiful months that come from BIG green caterpillars. Luna moths and Cecropia moths are a couple that come to mind. The regal moth has a caterpillar that gets almost 6 inches long. It's pretty scary looking too.
Just went to the library.... as far as I can tell it looks like a black swallowtail. The caterpillar feeds on members of the carrot family - parsley, Queen Anne's Lace, etc.