What's That Bug? does not endorse extermination

Unknown Moth
Photographed on outer apartment door in Ottawa ON on May 29th 2007 at approximately 6am. The outdoor temperature was 10C. At first I thought it was a beautiful butterfly but after some research (check out those antennae) I came to understand that it is, in fact, a moth. Very cool. Any help identifying would be greatly appreciated!!
Alice Murray

Hi Alice,
This is a Cecropia Moth, one of the Giant Silkworm or Saturnid Moths. The reddish-orange coloration on the wings helps to distinguish the Cecropia Moth from a closely related species, the Columbia Silkmoth which is also called the Tulip Tree Silkmoth. A western species, the Ceanothus Silmoth also looks similar but without the reddish-orange wing markings.

What's That Bug? does not endorse extermination

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