Or another species all together? At first glance, I dismissed it as a plain old cabbage white, but looking closely I realized it was more colorful (esp when it spread its wings and blue, exposing a pretty baby blue color.) Unfortmately that happened off camera…Research suggests this is likely a Spring Azure, I will keep reading…UPDATE: This appears to be a male Eastern-Tailed Blue Butterfly.
In other butterfly news, the Monarchs should emerge from their chrysalises later this week. Be sure to check on them when you walk past or visit the play area.
Concord Village EarthLab 
Agree with male Eastern tailed-blue butterfly ID. Beautiful!