The Zebra Swallowtail butterfly feeds almost exclusively on the leaves of the Pawpaw tree. When searching for the pawpaw fruit late in the summer, it is always a good indicator of nearby trees when these zebras are sighted. I was surprised to see them this early in the spring since I had seen no butterflies of any kind before today, and the pawpaws have just barely started to leaf out. The several days of 80 degree weather must have stimulated them.