Birds, we have know for a long time, can detect magnetic fields. It turns out that apparently this happens IN THEIR EYES.
Birds can SEE MAGNETIC FIELDS. Damn!
https://www.sciencealert.com/birds-see-magnetic-fields-cryptochrome-cry4-photoreceptor
@anthracite birds and cuttlefish are competing for my biological envy lately.
@anthracite that's pretty dope
@anthracite oh SHIT this is cool