1739 hrs (local) - and that wingercizing is how chicks fledge sometimes ... not this time however. The chicks hang on to the edge of the box while they flap - and their feet are very strong. When you see them hanging their wings down its usually a sign that they are tired/heavy, in other words their wing muscles still need some building up, they don't have as much strength as you might thing. We should see the flapping getting longer and longer over the next couple of days.