Caterpillar foods: leaves of asters (Bugguide)
Northern Crescents (P. cocyta) look very similar to Pearl Crescents (P. tharos). There’s some debate about whether they are all one species, or two species, or even three. I think most of the ones I see most resemble Northern Crescents.
Northern Crescents are larger. Males have larger areas of orange on the hind wings, with narrower black borders than Pearl Crescents. Pearl Crescents often have a dark line through the middle of the hind wing, and dark veins. Northerns have orange antennal clubs; antennal clubs of Pearls are dark or with a whitish tip. The range of Northern Crescents is more northern; Pearl Crescents have a more southern range. (Bugguide)
For the moment, I’m assuming all the photos I have from the farm are Northern Crescents.
6/17/2011 These are some of our most common driveway butterflies.
6/3/2011 Northern Crescents with one Gorgone Checkerspot