In reply to petemeads:
Bird shilouettes do not work. This has been established long ago, no idea why people still use them. What does help is foil panels that are transparent to our eyes but visible to birds in the UV. They can be a pain to fix to old windows, though.
Our animal event of the week was a nest of mallards that had bred on our grass roof, only a couple of meters from the children's bedroom window. We saw the adults at our garden pond and at the bird feeder throughout spring, but had no idea they were breeding right above my bed!
After the ducklings hatched, they were unable to scale the raised edge of the grass roof, so ran around beeping while the female flew up and down quacking like mad.
Eventually the children caught all nine ducklings, put them into a cardboard box and carried them down to the garden. When the female reappeared they toppled the box, and the entire family disappeared, stopping traffic by walking 200m through the neighbourhood to our local stream.
CB