The world outside the nest box can be a dangerous place! We are not quite sure whether this is a magpie or a crow, but if that talon caught a chick it wouldn't have much chance whoever owned it!
It was some time before we noticed that one of Amy's chicks has flown the nest today! All the action appeared to be happening in Box3 and the fact that a solitary chick had left Box1 was overlooked. Fortunately, we still had all the pictures taken by the Box1 cameras and so we could reconstruct the story.