I was sitting in my chair and I saw a robin out the window and I wondered whether it could see me (as in how far can robin’s see).  I of course googled it.  But, I got sidetracked and found a Discovery article explaining that robins can see the earth’s EM field.  According to the article the effect is due to the right eye, left half of the brain and a molecule called cryptochrome (best name for such a molecule, in my opinion).  The article discusses an experiment that shows that the birds can’t orient correctly if their vision in the right is obscured.  Of course this didn’t answer my original question, but it is much cooler.

This reminds me of Gary from Alphas (“respect the badge!”).