Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes


caterpillars on underside of a poplar leaf

caterpillars on underside of a poplar leaf
Wendell, Frankiln County, Massachusetts, USA
July 6, 2013
Maybe these are early instars of Mourning Cloak?

Moved from Butterflies and Moths.
Thanks David. I should have collected them and would have been able to see what they turned out to be in a couple weeks. The Nymphalis l-album lists poplar as a larval food, but I didn't see any reference for Polygonia interrogationis feeding on poplar.

There seem to be horns on the heads,
but I can't quite tell for certain. I'm thinking maybe Polygonia interrogationis, or perhaps Nymphalis l-album. I don't think any other Polygonia are this color when they are tiny (???). Mourning Cloak caterpillars don't have head horns (rather short bristly things), and they are dark grayish/blackish with red markings even when quite small; and, when newly hatched they may about be this color (with dark heads), but don't have the spines so well developed (these look older than newly hatched to me).

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.