Baby Birdie

we have a nest box in one of the trees in our garden and it has had blue tits nesting in it for 7 years on the trot! though the screws have rusted up so we carn't clean it out, so there's about 6 years worth of grime, ming and god knows what in there! they keep coming back, anyway, so it must be good!
Plugg blipped me taking this photo here!