The Spring Usher (Agriopis leucophaearia) is a moth of the family Geometridae.
With extremely varying camoflauge the male can be found to have either a light brownish, bark-mimicing pattern (right) to a black and white orientation that would be home on a birch.
This species of moth is rather strange as not only is the male a weak flyer, but the female is infact wingless, when emerging in late february and march.
their lava feed mainly on oak. and found mainly around england and wales.