They are medium-sized plump green caterpillars with a swollen thorax (the segment right behind the head, which in this case covers the head) sporting two prominent false eye spots used to scare ...

The caterpillars (and the adult moths) are very similar in appearance — 2¼ inches long, pale green with four long, bright red knobs on top of the head, and a yellow knob above its tail end.

A few weeks ago, I discovered a large, bright green caterpillar in the yard. It was the size of my thumb with small dark spots and several hairy spines on its back. The caterpillar was inching through ...