Yes they are. In fact, one just flew off with a peanut as I was in fixing my lunch a couple of minutes ago. They always make me laugh. It just seems so odd to me that such a little bird could fly off with a whole peanut.
I saw something funny the other day when I got home from work, too. I keep a big pan on the back porch full of sunflower seeds and peanuts. It is actually there for the squirrels. The birds, however, don't see it that way, and several of the birds eat from it too. The other day, there was a pair of Cardinals that kept divebombing this squirrel, trying to run him off. It was funny, because normally the Cardinals don't mess with the squirrels, or even the bigger birds, at all.
Wow, that must have been funny. I have never seen a bird do that to a squirrel. Brave Cardinal. LOL!