Easter Tiger Swallowtails are everywhere already. I spotted a Spicebush Swallowtail today in the neighborhood, the first this year, but no photo.
Henry's Elfin. They usually stay in the trees, but maybe this one was trying to puddle in the moist sand. These a short termer, having one flight in spring, and disappearing for summer and fall. They're about as big as a medium sized fingernail.
Falcated Orangetip, named for the uhh, falcated (hooked) orange tip? These too have a single flight in spring, and disappear for the rest of the year. It's hard to see the orange tip in flight, and only the males have it; the females are just white on top, but they both have olive green mottling on the underside. From a distance, they're easily confused with the dime a dozen Cabbage Whites or the white form of the Clouded Sulphur. They're a bit smaller, and fly a little different, but it's kind of a hard call.