It's the same with Squirrels. They look cute and cuddly, but this belies an agressive nature and urge to dominate. Again, imagine they were a bit bigger, and that you were a bit smaller. Remember Veruca Salt? Gah! And of course there is nowhere they cannot get to, no obstacle insurmountable, and not forgetting that they are utterly bomb-proof. Next time when one chatters above your head, be thankful that evolution took a slightly different course.