Mine once got changed to a spider (and a creepy one at that how it crawled into the animation! ::shudder::) so a sparrow is better than that too... And well, bunnies are all Watership Down like... :) (strangely enough I've only seen hares appear myself, it seems a lot of people in fandom picked options uncomfortable with crowds or something so you get more hares than bunnies and more predators than herd animals).