This is a moth that has just emerged from its pupa. It is drying its wings in the afternoon sun as the veins in its wings slowly fill up with fluid. The veins in the wings are not completely filled so the wings are an odd shape. It cannot fly yet. Eventually the veins will fill and stiffen to support the wing structure you expect to see on a moth, as long as a bright-eyed bird doesn’t spot it in its current immovable state.