Image 1 of 1
cbolt_dusky_birch_sawfiles.jpg
Although these insects may look like caterpillars, they are actually larvae of the Dusky Birch Sawfly (Croesus latitarsus), a type of bee in the Hymenoptera ordera. When feeling threatened, they all rasie up from their host plant (often river birch, Betula nigra) in unison in this impressive display to ward potential predators.
