This technical image goes with the Visible Light Peacock shot. Surprisingly, the blue and green bright colours have gone to be replaced with "black". What is happening is that the blue and green pigments in the feathers arise from reflection and refractions from tiny cellular structures within the feathers. The feathers also contain melanin, a pigment that absorbs IR light. As the tiny structures do not affect IR radiation it is absorbed giving the "black" look. There is clear scope for further work here.