Something went wrong a few years ago where I live, a West wind or South West wind - the birds would come straight over my loft as I am right on the coast Then about 5 years ago it changed, no matter what the wind is the birds 99% of the time come out of the West - that's inland for us, they're never on the coast - now whether it is Birds of Prey and too many nesting sites on the coast I just don't know Yet those people who fly inland won't have it!! Well it's true for my area