Re "Native Australian budgerigars are blue incolour"

["Philip Veerman" <>]

Hi Andrew,

Sure, it is a little semantic though. Do I need to elaborate? The point I was 
making is that there was not a NEW chemical or physiological process created 
that produces a new type of pigment. Although in other cases this could occur 
and obviously does in the long term. Yes in the case of new colour in domestic 
budgies, it results in a different colour, but not because of adding another 
process, just removing a process from the mix.

I don't know anything about the problem over Biston betularia, or of the 
"appalling non-scientific methodology". I know it is an often quoted example 
and I know the story well but only in that context.

Philip