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Photo#1103493
black and yellow caterpillars - Nematus ventralis

black and yellow caterpillars - Nematus ventralis
Barstow, Rock Island County, Illinois, USA
July 15, 2015
Size: 1-2cm
I found these very active caterpillars devouring the leaves of a willow thicket at a degraded urban wetland.

Moved

Moved
Moved from ID Request.

Willow Sawflies…
See reference here.

check Nematus ventralis
willow sawfly

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