This is a record shot from this past weekend. They were spotted on a sandbar out in the Potomac River. Someone sent out an alert by email to the VA birding listserve this past Saturday and, luckily, Mike checked his email not long after, so we grabbed our gear and ran out the door, since this location is just a couple miles from the house. They were at quite a distance - this is fully zoomed with the 100-400mm lens. They're rare here in summer, and we hadn't seen them before in breeding plumage, so that was the big deal.
Posted here full size, full scene, if it's of use for the record, as I'll be posting this along with my eBird report.
We were able to see them only from the bridge, way out into the river. We tried seeing them from the shore near the Hunting Point apartments as well as from Jones Point Park and the Lighthouse, but couldn't, due to obstructions (mostly trees).
American Avocet, Recurvirostra americana
Potomac River, seen from the bridge just south of Old Town Alexandria over Hunting Creek