Blue Tit Box

The Blue Tits in my back garden had a pretty unsuccessful spring last year (one fledgling was found in the pond and I discovered this sorry sight when I cleaned out the box today).
The good news is they're raring to go this year. The box has been down for over a week and today I put it in a new position (further away from the pond) and literally after closing the back door behind me I turned round and one of the blue tits was at the hole!