45 - 50mm
The male Orange Tip is quite unmistakeable, having a large area of orange on the forewings covering about a third of his wings, and tipped with black on the outer edges. The female has only a curved dark area which is larger than the black on the male but not so extensive as his orange area. A black central spot on the forewing is enclosed by the orange on the male but shows free on the female. The hindwings have a faint dappling of grey-green which is caused by the other distinguishing factor - the heavily marked scaling on the rear underwings of both sexes, which appears green, but is a mixture of black and yellow, giving an appearance of lichen or moss.
The Orange Tip is on the wing from April (even March in a warm spring) through May and June. The males emerge first.