Another caterpillar

I promise, this will be the last caterpillar for now. They are interesting creatures because of the variety. It's been estimated that we may see as many as 300 different species of butterflies over a period of a year at Bosque Santa Lucia. Obviously there's a caterpillar for each kind. Look at this one. It's so different than the others I showed today. Can you figure out which end of the caterpillar is the head and which is the tail? We're used to see antennas on the heads of animals, but it's contrary on this one.