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Joined 1 year ago
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Cake day: April 5th, 2024

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  • I don’t know. My knowledge stems from my biology classes at school and what my parents told me. And that was some time ago. :) I didn’t know the word cere, so I looked it up and found the UV part about owls and felt the urge to share it. I didn’t look into that study until now.

    I’d like to know more too, but I don’t think I have the energy to pull through if I’d dive into that rabbit hole. So I won’t try. :)

    The authors state: Rods are responsible for the gray scale scotopic vision under low light conditions - so grey scale brightness, only. The cones are not relevant because it is too dark. Or are they? There are those oily cones which maybe can detect UV light? If so: still no colors, just brightness. To me it looks like the authors of the study offered some educated guesses.

    I would say it means: Either it is greyscale brightness but maybe it is something else. But the authors don’t know. They just know that the owl perceived the difference.


    It looks like the owl’s eyeball doesn’t absorb the upper range of UV-light (350nm+) so it could reach the owls receptor cells: https://journals.biologists.com/jeb/article/224/20/jeb243129/272645/Lens-and-cornea-limit-UV-vision-of-birds-a

    I didn’t find anything about that secondary (beta) peak that I could understand - maybe it is about the biochemistry in the rod/cone which can be split into phases when light hits the cell. I’m lost here. The google-LLM pointed me here: https://pmc.ncbi.nlm.nih.gov/articles/PMC3265844/ I’m not even sure, if this is a match for our context.





  • hsdkfr734r@feddit.nltoAutism@lemmy.worldWhat would you put in your?
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    2 months ago

    I wish you could live your life in a more bearable way. I don’t know what life is like for you and how you can make it easier for yourself. The way there is different for everyone. I wish you strength and hope.

    I’m not where I want to be yet. Accepting what I can achieve and figuring out what I really want and what I think I should do has helped a little. I have found support. It’s better than before. But again, everyone is different.

    (Thanks deepl.com)

    And yes. Those statistics suck.

    E: the word acceptance only makes sense to me in hindsight. I had to experience it.



  • hsdkfr734r@feddit.nltoSuperbowl@lemmy.worldNose Job
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    2 months ago

    Random facts incoming.

    It is named Wachshaut in german because it looks… waxy. It describes the featherless part at the base of the upper part of the beak and:

    https://en.m.wikipedia.org/wiki/Beak#Cere

    The cere color of young Eurasian scops-owls has an ultraviolet (UV) component, with a UV peak that correlates to the bird’s mass. A chick with a lower body mass has a UV peak at a higher wavelength than a chick with a higher body mass does. Studies have shown that parent owls preferentially feed chicks with ceres that show higher wavelength UV peaks, that is, lighter-weight chicks.[57]

    Huh, built-in scales. :)

    Btw: Beaks!