Saturday, August 3, 2013

Halloween Pennant

Erika and I have observed several Halloween Pennants this summer. This photo is from the Bass Ponds in the Minnesota Valley National Wildlife Refuge in Hennepin County, Minnesota. I have previously blogged about this hardy species, tolerant of cool and wet days. (Paulson 2011) reports that this dragonfly’s fluttery, butterfly-like flight and vague resemblance to a Monarch Butterfly’s coloration may be enough to discourage some avian predators. This hypothesis seems like kind of a stretch to me, but, if true, would be an example of Batesian Mimicry, wherein palatable species resemble distasteful ones.

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