I was always wondering how the world looks like from their perspective, as they can see very different spectral regions. Especially the UV region, because the urine can be seen pdf
![](https://steemitimages.com/640x0/https://steemitimages.com/DQmPRcQ4zQRpjqFHjBohPMVX8CqbVYtPdx2yE1V2oY7Eo21/image.png)
Source
I don't know about that UV navigation in pigeons, I will try to find something...
It was about cryptochrome protein in migratory birds, something like that...