Go to Telic Thoughts and watch the video of a crow trying to get food out of a container with a wire. The bird can't manage it so it bends the wire into a hook. It's astonishing.
TT also links to a fascinating article at Neurophilosophy on how birds navigate. There are evidently at least two separate mechanisms employed, one for measuring the strength of the earth's magnetic field and one for assessing its direction. These mechanisms are incredibly "engineered" and certainly suggest intelligent input. But maybe not. Maybe they arose by blind forces acting by trial and error over millions of years, just like your computer might have if nobody had ever designed one.
RLC
