We have a garden full of fledglings at the moment. Mainly blue tits and great tits, but also the odd greenfinch and hedge sparrow (or dunnock, as we're supposed to call them these days). They are creating one hell of a racket.
Fortunately for me (but potentially disastrously for them), some of the fledglings haven't quite got their heads around the concept of immediately flying away and hiding when something bigger than them appears. So I managed to get quite close to them with my camera: