The Mottled Umber (Erannis defoliaria) could be one of the most difficult to identify Geometrid Moths, if it weren't for its striking flight time in winter.
They are often easily recognized by the dark brown bands on the wings (often edged with a black band) and the black dot (as in the photos).
But less well-marked specimens look very much like the Scarce Umber (Agriopis aurantiaria) if it weren't for the fact that the latter does not have banded legs.
It only flies at night, but is often found resting on trees, fences and walls during the day.
The Mottled Umber likes to come to light, sometimes in large numbers.
It is a very common species throughout Europe.
I found the moth on our outdoor lamp during the day.
In my yard, Hilversum, The Netherlands, 8 November 2020