You're right, I was unaware. Since I have only been a part of this forum for like a month or so, and never before this have I been a part of any online bird community. This is why I am asking. What I did find on the subject wasn't what I was looking for, though, maybe I missed it though I am willing to grant.
By two species do you mean reptiles and birds, because they are not species? I am confused. But once again I will state: birds *are * reptiles. Not all reptiles are birds, but all birds are reptiles. It is a categorical distinction made based on skeletal structure and features, as well as evolutionary history. Birds *are* dinosaurs, dinosaurs *are* reptiles. Birds *are* reptiles. Just because a platypus lays eggs, has no teats, and is venomous does not make the monotremes any less mammal than placental or marsupial mammals. Nature is weird. Biology in particular is reaaallly weird. It's why, if you are a nerd like me lol, when you watch documentaries about dinosaurs they specify frequently "non-avian therapod". Because birds are derived therapods. Birds are dinosaurs... I'm repeating myself.
I'm not sure at all what you mean by your abbreviation "CAV". Would you care to elaborate please? If you mean something like "common ancestral value"(lol only thing I could think that might fit), time doesn't act at a standard rate in the evolution equation. The crocodiles, bird's closest living relatives, have not changed much at-all in over 100 million years. They are hardly the only example. Time is a factor in evolution, yes, but it is not a standard force in how it is applied(sometimes affecting certain systems or whole organisms at different rates (meaning an animal can appear greatly changed while remaining very similar, think chihuahuas and great danes, or may look very similar but be vastly different, think polar bears and pretty much any other bear, or Giant Pandas and same, or gee: polars and pandas. Superficially they are remarkably similar, but physiologically they are vastly different.)). Our evolutionary history absolutely affects our needs. Profoundly. In a way that nothing else does. It is, in fact, what has *shaped* our needs.
Hmm, thats's disappointing about the studies' funding coming from filthy bulb-pushers. If you have links, though, I think I'd still like to see them. I know how to read and interpret hard data and not rely an the conclusions drawn by the study's authors. If the method and the data are presented, the study has value even if the conclusion is some product pushing garbage or other, or if the sample is biased or too small or some other rather large flaw. Data is data, even if the presented conclusion is utter unfounded garbage.
And your point on the subjective nature of "wellbeing" is precisely why I am interested in specifically scientific data. Serum D levels as a product of various exposure types and durations to UV rad as well as various dietary sources, synthetic and natural would be absolutely lovely in particular. It may be my choice, but I'm looking for data so I make the best, most well-informed one I can.
Thanks
From phone