I'll take R2 over C-3PO any day.
Starling Bird Performs Spot-On Impression Of R2-D2

This is a video of Jabber, a beautiful human-imprinted European starling mimicking its owner, and throwing in a surprisingly accurate R2-D2 impression just to keep things spicy. And you know how I feel about spicy! Actually you might not, but I love it. I even did that Paqui One Chip Challenge after getting one of the chips for Christmas. It was hot, but really not that bad. Granted, I am used to suffering. Totally melted my eyeballs taking my contacts out though.

Keep going for the video, R2 shows up right after the 0:30 mark.