American Lady (Vanessa virginiensis). Very similar to the Painted Lady (V. cardui), which, like the Monarch (Danaus plexippus), is migratory. Saw my first Monarch as well (last year I noted my first at the end of June); the milkweeds, which Monarchs are so associated with, were only three-four inches out of the ground. I’m using the Kaufman Field Guide to Butterflies of North America to differentiate my Ladies and Polygonia. 
Red Maple (Acer rubrum) keys.
Butterflies, Butterfly-Shaped
Published April 20, 2012 Fieldnotes 2 CommentsTags: butterflies, insects, Jamaica Bay, trees
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I didn’t even know the American lady existed. I just started collecting butterflies (with my camera) a couple of years ago and am still learning. Just spent a few minutes comparing photos so I can tell them apart. Thanks for the post!