"Traditionally Scotland has had a lot of odd incidents, right through history, from ghosts and poltergeists to supernatural beings and the Loch Ness monster. So, Scotland is well-known as a place where strange things happen, Ron Halliday, author of "UFO Scotland," said.

Others had a less dramatic explanation.

"UFOs tend to be attracted to regions that are fairly remote. Plus if you have a remote area, look out for airbases; Scotland is littered with them," Graham Birdsall, editor of UFO magazine, said.

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I have a simpler explanation. One that satisfies Occam's Razor.
Single Malt Scotch.

-philw (let's make fun of the Irish next!)