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If the images in the article are accurate, the birds don't really see the polarity of the field, merely the alignment, so they don't really see "north", "east",
by gilgoomesh 9y ago
If the images in the article are accurate, the birds don't really see the polarity of the field, merely the alignment, so they don't really see "north", "east", "south" and "west", merely "latitudinal" or "longitudinal".
They would probably combine with sunlight to get the real orientation – an approach which would continue to work with a flipped magnetic field.
- andai 9y agoIf you have 3D polarized glasses from the cinema you can go outside on a sunny day see this alignment in the sky. It's really cool, highly recommended.
- spacehome 9y agoYou can see it with the naked eye, too, near the center of your vision. https://en.wikipedia.org/wiki/Haidinger%27s_brush https://en.wikipedia.org/wiki/Haidinger%27s_brush
- deleted 9y ago[deleted]