Tawnys again

I ringed what will almost certainly be my final Tawny Owl chick of the year tonight. That makes a grand total of three this season... It wasn't the fattest chick either and there was no food cached in the box. Interestingly, the box is part of a double-decker arrangement. It's at the top of a pole which has another box below. In most years, both boxes are occupied by something and I have had kestrels in the top and Tawny Owls in the bottom at the same time before. When I first checked this year there was a Jackdaw nest in the bottom box. Subsequent checks revealed an adult Jackdaw carcass in the Tawny's nest and a clutch of cold Jackdaw eggs below. One can only guess the story...

Pete