The blue tits seem not to mind that I fell the cherry tree and hung the nesting box on the plum. I see them daily there and they sing in the tree, so I think they are nesting there even though I have not seen them entering the box. What was my surprise then when I looked at this picture and I saw one blue tit and one field sparrow with a bunch of feathers in his beak. A few moments later I heard some squabbling and the fluff floated down from the tree. Maybe the sparrow was stealing bedding from the tits? These tiny birds are pretty mean to each other so that would not be surprising.
And a first daisies came out.