Sad day in the wood shed

Was doing my daily check on the blackbird which has been nesting in the woodshed only to find total devastation.

A pile of logs on which the nest had been resting had fallen down on the ground and the nest was lying underneath them. Not sure if it is the result of a cat or that fact that the logs may have moved as they've dried out.

I found two shells in tact, and one cracked and the foetus of another, half in its shell. (You can see the nest on the right of the picture in its fallen state).

Sad to see it all end this way - was really getting excited about the chicks hatching. Anyway, guess that's just the way of nature for you.