Undertones

Always a challenge to capture a butterfly  image but this one folded its wings and   hunkered down deploying  its camouflage to blend into the background. It's a common green-veined white (I think)  one of a myriad flitting along the hedgerows  like snow flakes in the sunshine. But underneath, its grassy disguise makes its very hard to spot. The effect comes not from pigment but from black and yellow scales that  refract light to create the colour effect and confuse the eyes of  potential predators.