Here in California, our Blue Jays don't look like this, as to color and markings, but they look exactly like this, as to body language, when they are being sassy. They make me laugh all the time. If you give them peanuts in a shell, they shake it to find out if it's good. If it's not, they drop it, and wait for another. If you don't give them one, you're likely to get a loud protesting squawk. They look just like this Blue Jay. How they decide if the peanuts in the shell are good, I have no idea, but they know, and they can't be fooled with an old musty peanut.