There was something wrong with one of them for a while. It would squawk loudly for no reason at random times, as if it was in some discomfort. This was prior to the banding, and was even in good weather. A while back it looked bad, wasn't going for food, then rebounded a bit. As an aside, we visited the nest in Azusa canyon the other day. Two much older looking fledglings in the nest. Looked just about ready to go.