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Fringed Birch Sawfly - Dimorphopteryx

Fringed Birch Sawfly - Dimorphopteryx
Harvard, Worcester County, Massachusetts, USA
September 19, 2004
It was on a gray birch leaf, and when I tried to move it, I couldn't, because all it's legs (hooks?) were dug into the leaf.


Fringed Birch Sawfly
Dimorphopteryx melanognathus. This genus has telltale two-toned head. Also horns behind head project when disturbed much like Swallowtail (Papilio) larvae. Also feeds on Maple and Willow.

Dimorphopteryx melanognathus
Thanks for the ID. I'm glad i don't have to try and pronounce that name:-)

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