I am not sure I understand Porod's Law. Would it be possible to go over it and how you use it along with scattering profiles to determine that constructive interference is contributing to the observed colors?
Presumably there is ~ a 1:1 mapping of color pigments/structural colors displayed in a taxa, and that taxa's capacity to see those colors. Is this true, and if so, how does the color vision of other animals with a long evolutionary history of diurnal activity (eg lizards) compare to birds? Are birds remarkable with respect to sight and color display?
Is there a link between colorfulness/reduced crypticness and mortality? That is, are birds under high mortality pressure from visual predators penalized for colorfulness, but without that pressure colorful plumage is sexually selected? Are other ecological factors important in governing plumage color?
I have the impression that in some birds (some parrots) both sexes are equally colorful, but in other (like the mallard duck) the male is colorful but the female drab. What are the phylogenetic or ecological correlates of plumage differences in the sexes?
Have any crepuscular birds lost the ability to see in color (to some capacity)?
I am not sure I understand Porod's Law. Would it be possible to go over it and how you use it along with scattering profiles to determine that constructive interference is contributing to the observed colors?
ReplyDeletePresumably there is ~ a 1:1 mapping of color pigments/structural colors displayed in a taxa, and that taxa's capacity to see those colors. Is this true, and if so, how does the color vision of other animals with a long evolutionary history of diurnal activity (eg lizards) compare to birds? Are birds remarkable with respect to sight and color display?
ReplyDeleteIs there a link between colorfulness/reduced crypticness and mortality? That is, are birds under high mortality pressure from visual predators penalized for colorfulness, but without that pressure colorful plumage is sexually selected? Are other ecological factors important in governing plumage color?
I have the impression that in some birds (some parrots) both sexes are equally colorful, but in other (like the mallard duck) the male is colorful but the female drab. What are the phylogenetic or ecological correlates of plumage differences in the sexes?
Have any crepuscular birds lost the ability to see in color (to some capacity)?