Good Morning,
and thank you, Peter.
I know the differences between pigment and structural colouration from ornithology (e.g.,hummingbirds are a wonderful example for structural colours).
Thus, I’m afraid, your post doesn’t answer my question ….. :unsure: It was not “why” is my male coloured like this – but is this colouration known for P. nagyi, at least for the form Pekan Nenasi? I have not seen it mentioned anywhere – maybe it should be added to the description. And – is it unique in Pekan Nenasi, or do the forms from Cherating and Kuantan also show it?