Does anyone know: Can neighbour use a bird scarer to scare birds from my garden?

Hi all

My disagreeable next door neighbour has placed a bird scarer on the outside of their bedroom window nearest to my garden, and it is angled directly into my garden, towards the place where all of the nesting tits, robins and nuthatches feed inside their Guardian cages, and where the great spotted woodpecker feeds on the peanut feeder.

It covers a range of 1500 square feet, which is quite a large part of my garden.

This is what it looks like: http://www.pitchcare.com/shop/repellents/model-mp1-silent-bird-scarer.html

I believe that it's the kind of bird scarer that farmers use on their crops to scare birds away from seeded areas. Although I can't hear any high pitched noise, it clicks constantly and it's loud enough that I can hear it from the other side of my garden.

Is there anything I can do about this? I can't see why she should be allowed to scare birds from my garden. If she had placed it flat on the window, then presumably it would scare birds from her garden. That would be up to her, but to deliberately angle it so that it points directly at my garden seems a bit rich.

She has an excessively high and very dense conifer hedge ( approximately 18 feet high) that attracts lots of birds in the area, as they are really tall trees that they can easily nest in. There are robins, chaffinches, tits, starlings, blackbirds and wood pigeons all nesting in her conifers at the moment. By scaring them she may disrupt their breeding. I'm sure she isn't allowed to do that.

There is no discussing anything nicely to this person. She is a crank, and her opinion is the only one that counts. So I'm not sure where to start to even look for help.

Best wishes Chris