Discussion

@leaverou
I used to toss peanuts to crows regularly, and they were comfortable approaching me. One day in early winter, an hour or so after sunrise, a crow walked in front of me, between me and the sun. I was wearing amber polarized sunglasses, and just for ten seconds or so I saw red and turquoise bars on its wings - one of the most astonishing and beautiful things I remember. I've never been able to duplicate it, and have never found corroborating evidence, but I remember thinking "oh that's how they can tell each other apart"

@leaverou wait, birds are tetrachromatic?

@leaverou Just today morning i layed in the sun with my dog and a flock of starlings started scavaging the park we were in. The sunlight reflected super colorful on them.

@leaverou I don't think that infography makes any sense. We do have a sensibility to green, but we still see colors from 400nm to 800nm. Also, what species of crow is that? I don't know any with white spots and a yellow beak.

Is there any source for that?

@leaverou Could you make the colors visible by taking a photo in RAW format and adjusting the color settings? I don't know how camera sensors work, but maybe they're able to capture these colors.

@leaverou Who keeps putting the UV at the lower, and infrared at the upper part of the spectrum??!

@leaverou Albeit the above is very true, this is also very much not a crow.

@leaverou I think that is a starling, but that makes it no less amazing.