Most reindeer live North of the Arctic Circle, where the sun does not rise above the horizon in winter months. I suspect most summer days are brighter than the few hours of twilight the reideer get in December.
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ceenote@lemmy.world 3 days agoPlus, no summer day is brighter than a clear winter day with snow on the ground.
Suru@mander.xyz 3 days ago
TachyonTele@lemm.ee 3 days ago
The pupil dilates, combined with more uv light seasonally, changes the structure of the iris and this it’s color.
Catoblepas@lemmy.blahaj.zone 3 days ago
It is if you live in a part of the world that is dark for months at a time during the winter, like reindeer do.