Butterfly

Spotted this one on a rather dried up piece of watermelon which had been left and forgotten on the bird feeding station.
It has rather unusual coloration with the 'outer' wings looking like rough bark while the 'inners' seem to be brightly coloured.
It was so intent on feeding that I was able to get within centimetres with the lens without provoking any reaction. Didn't want to push too close so the pic is about a 5o% crop of the area photographed.
Finding this and getting this and other pics made a pleasant change from clearing up after the plumber!!