When omens attack!

To say I'm not a superstitious person understates my general views.That being said today I saw a bluebird. It alighted on my window and looked right at me. I've never really seen a bluebird before. Of course I've seen pictures of them and studied them a bit in nature studies back in high school. To have one just look at me right off the bat was somewhat odd.Now bluebirds are said be be omens of good fortune:

Bluebird: denotes spiritual joy and contentedness, foretells happy conditions in one's life

So... What's it mean when said bluebird starts attacking your house?httpvh://www.youtube.com/watch?v=NAbZzdalZh4