Calvin and Hobbes by Bill Watterson for September 09, 1988
Moe: Hey, Calvin, you're on my swing. Get lost. Calvin: I'm not scared of you Moe. Moe: Oh, no? Calvin: Nope. You're so dumb you probably never thought about how a sparrow's smaller size and greater maneuverability is an advantage in fighting off big crows. Moe: Yeah? Calvin: Those TV nature programs will be the death of me yet.