Swallows and Swifts

A nice find on returning home last night was a group of Chimney Swifts and swallows feeding over a (presumed) insect swarm across the road and doing passes over my property. A couple of large dragonflies were also hunting. At first I assumed it was just two or more Barn Swallows, but after fetching binoculars I saw two Northern Rough-winged Swallows perched on one of my Silver Maples. Northern Rough-winged is a new yard bird.