It was fascinating to see them hunt and consume their insect prey in mid air. Periodically the would swing their claws towards their head; we assumed they were eating the cicadas or whatever insect they were catching. According to what I've read, this is a typical behavior; however, if they catch lizards or other small prey, they perch to eaty.
Finally, the juvenile landed in a nearby tree and we were able to get our scopes on it and get some pictures. Great fun! Thanks to Renee and the VA-Bird list for helping me gain another new bird!
I guess soon they will be migrating to Central/South America!