We have a lovely oak tree in our garden, but we're not the only ones who enjoy it!
There's always numerous crows / pigeons who, shall we say, treat our lawn as a toilet from the branches.
I've looked at deterrents on the net such as a super-sonic bird scarer and a plastic hawk - but has anyone used these successfully? Ideally I'd rather have something that doesn't just frighten off all birds (I love it when we get the parakeets), just the ones who do massive poos!
All suggestions / recommendations gratefully received.