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Photo#610315
ant - Formica subsericea

ant - Formica subsericea
Cross Plains, Dane County, Wisconsin, USA
July 31, 2011
Size: ~7mm
This ant was found in grass in an open field which has not been mowed for years. There are several large ant mounds found in parts of the field (which I only find accidentally at times if I happen to step on them and can feel that the ground is higher since the field is so overgrown). This type of ant exhibits a very strange behavior at times. When first captured it will twist itself into strange shapes (as shown in the third photo) and then just as quickly return to its normal stance.

Images of this individual: tag all
ant - Formica subsericea ant - Formica subsericea ant - Formica subsericea

Moved
This is an abundant field (including prairie) and open woods ant in your area. That twisting behavior is unusual, but maybe in response to defensive chemicals secreted by some other insect in the sweep net (if collected that way).

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