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Photo#517582
Eastern Tent Caterpillar - Malacosoma americana

Eastern Tent Caterpillar - Malacosoma americana
Hoosier National Forest, Monroe County, Indiana, USA
May 10, 2011
Saw a few of these on the ground moving FAST - they were on a mission! The blue color on the sides is VERY striking in person, but didn't show up well in my photos.