Michal Szkudlarek wrote:It is just a illusion, like blue color of the sky or white color of arctic bear's fur.
An illusion? I don't quite understand what you mean by that. Rayleigh scattering is a physical mechanism
producing blue both in the atmosphere and in iridophores. The resulting blue light is REAL. Or you can
call light as such an illusion.
Michal Szkudlarek wrote: Blue color among R. arvalis males in mating season is characterized by structural origin.
It is said that this color is caused by lymphatic gathering.
Yes, that's the only thing Mr. Google can give you. It explains nothing, and personally I think it's wrong. I suspect
someone wrote it somewhere some day, and it's just being rewritten on and on.
Michal Szkudlarek wrote:Curio- after catching blue male, this color disappear, but returns after releasing him to water
It strongly depends on the sexual excitement of the male, and can disappear and reappear rather quickly.
It disappears if you "harass" the animal in any way, and reappears if you put it next to a female, with or
without water. That's what makes me think of it's being controlled neuraly, but I really don't know, nobody
seems to do. Sunshine and temperature seem to have no effect - after all, they are blue at night as well.