According to certain Native American beliefs, seeing a Bluejay is considered good luck. It is thought that they are good luck and good fortune to those that see them in the wild.
I’ve also heard that they are mean and vicious to other birds. Very aggressive and territorial. Some even call them the villains of the avian world.
I guess it’s one of those regular cases of how you want to look at something. Sometimes the line between good and bad is all in how you perceive things. Life sure is funny like that.