Good news, however. I went out there on May 25, and there was a parent sitting on the nest. She flew away as I came outside, though. I then carefully watered the plant. (I consulted with a woman at work who raises chickens and has raised orphaned wild birds. She said to keep watering the plant, that the birds would probably be hapy. As long as I didn't mess with the nest or soak it with water, they should be okay.)