THIS TRIP IS FULL. WAITLIST ONLY.  On a morning walk, we’ll look for Cliff Swallows building mud nests beneath this bridge in the northeastern part of the county. We will also explore wooded trails on WSSC property bordering the reservoir to observe other possible breeding birds including Scarlet Tanager, flycatchers, and thrushes. Be prepared for bright sunlight at the bridge and possible biting insects in wooded areas. Trip will be cancelled in case of heavy rain or thunderstorms. Meet at 7:30 a.m. Limit: 10. LEADER: Paul Orsinger at [email protected].