Anni - really nice idea for the challenge. Lovely colours and the spibers web over the hole really helps emphasise just how 'closed' this birdbox is.
I would be interested to see it re-cropped with the box slightly straightened on the verticals and the crop pulled in from the right to lose the side of the box. . .
What a GREAT idea for a closing challenge! And I love the contrast between the pretty purple flowers and the unattended state of the bird house with the spider webs and faded wood.
A very clever and subtle take on the challenge which is matched by the photo itself. May not be to everyone's liking but I have to say I think its cool