Gunfight at the OK Corral

My first squirrel, ladies and gentlemen. Improbably, I had not seen a one since arriving to this fair and hellishly hot city a month ago.
What are those, like cute rats with furry tails?
I saw it, it saw me. It climbed up a tree and we stared each other down. I can do lots of things but climbing up a tree ain't one of them. If it hadn't been for Enchilada's fast grip on my smiley face leash, I'd have run in hot pursuit.
Here I am, stalking a blueberry: