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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Migrating birds calculate declination! (1 Viewer)

Got any other (more reliable!) sources for this?

Remember Wikipedia banned the Daily Mail as a reference source because of its unreliability ;)
 
Reminded me of one of those more astounding discoveries 3 or 4 years ago, that birds have magnetism receptors in their eyes - in other words, birds can see magnetic compass direction like we can see colours. I'll see if I can dig out the reference.
 
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