Tersa Sphinx Caterpillar Showing Actual Head
In this view you can see the real head and some of the feet behind the head. Gotta love a species that evolves its larvae into two different colors to confuse predators. I found out that some of its predators won't eat green forms and some won't eat brown forms so when the moth lays eggs, both color forms hatch, increasing the chances of survival for some . Genius.
Tersa Sphinx Caterpillar Hodges # 7890 (Xylophanes tersa)
From Insects and Spiders