The flycatchers left the nest today. We found the first one resting on the step at about 10:30 this morning, having a snooze in the sun. He/she seemed completely unconcerned that I was there.
At that point the other three were still in the nest.
We had to leave shortly thereafter, and when we got home at 6:30, the nest was empty. We could hear Mama Bird still chirping in the big tree out front, and little baby peeps coming from the front garden.
We didn't investigate too closely, since we didn't want to scare them. I'm so proud.