![Correlates of individual variation in the porphyrin-based fluorescence of red-necked nightjars (Caprimulgus ruficollis) | Scientific Reports Correlates of individual variation in the porphyrin-based fluorescence of red-necked nightjars (Caprimulgus ruficollis) | Scientific Reports](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-019-55522-y/MediaObjects/41598_2019_55522_Fig1_HTML.png)
Correlates of individual variation in the porphyrin-based fluorescence of red-necked nightjars (Caprimulgus ruficollis) | Scientific Reports
![How the ability to perceive ultraviolet light permits birds to see what human eyes cannot - BirdWatching How the ability to perceive ultraviolet light permits birds to see what human eyes cannot - BirdWatching](https://cdn.birdwatchingdaily.com/2013/05/brd-d0606-500.jpg)
How the ability to perceive ultraviolet light permits birds to see what human eyes cannot - BirdWatching
![🔸BazTeki🔸 on Twitter: "Ok I knew birds see in UV and have UV markings, but I did not know some glow under black light? Can any of my bird friends confirm?? https://t.co/0R2zJBKoeH" / 🔸BazTeki🔸 on Twitter: "Ok I knew birds see in UV and have UV markings, but I did not know some glow under black light? Can any of my bird friends confirm?? https://t.co/0R2zJBKoeH" /](https://pbs.twimg.com/media/C-cHwq1VoAAFc83.jpg)
🔸BazTeki🔸 on Twitter: "Ok I knew birds see in UV and have UV markings, but I did not know some glow under black light? Can any of my bird friends confirm?? https://t.co/0R2zJBKoeH" /
![Twitter 上的Mark My Bird:"We're not just interested in bird plumage as we see it, but also how it looks under UV light. This is because birds, as well as seeing what Twitter 上的Mark My Bird:"We're not just interested in bird plumage as we see it, but also how it looks under UV light. This is because birds, as well as seeing what](https://pbs.twimg.com/media/DRrjt5yX0AMwM32.jpg)