Black-Billed Magpie Rowdydow

From my kitchen I hear a terrible squawking in the front yard. Thinking a bird may be trying to fend off a cat or something, I go to check to see if the bird is okay, and what I find is two black-billed magpies having a squabble.

 

Then the argumentative bird notices me laughing and taking photos

The bird begins to squawk directly into the house and tap on the window after the other bird left. The other bird comes back, but the argumentative bird still is tapping on my window... My cat and I were both stunned at this point. But in a few minutes the pair flew off together, the end.