The paper cites previous work where blue light is associated with magnetoception in other species. The whole color thing really threw me off at first, too, so s

The paper cites previous work where blue light is associated with magnetoception in other species. The whole color thing really threw me off at first, too, so seeing the previous results was a little reassuring in the sense that it made the light color association seem, so to speak, less out of the blue.