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rwmjyesterday at 8:43 PM3 repliesview on HN

My favourite blue tit fact is that they are sexually dichromatic under UV light only. The male crown is brighter in UV and females prefer males with brighter crowns. Mere humans can't tell the difference.

Comes from this rather brilliantly titled paper: Blue tits are ultraviolet tits https://pmc.ncbi.nlm.nih.gov/articles/PMC1688906/


Replies

rgloveryesterday at 11:05 PM

> Comes from this rather brilliantly titled paper: Blue tits are ultraviolet tits https://pmc.ncbi.nlm.nih.gov/articles/PMC1688906/

Made my day. Love it when you can tell they could have titled it something else but decided the joke was technically accurate and worth it.

rao-vtoday at 12:32 AM

Read this as "Male humans can't tell the difference." and found it comic

mc32yesterday at 10:15 PM

They UV will sharpen them up and get them ready for a bit of the old Ultraviolets.