This species has brown forewings, varying considerably in tone, with indistinct darker markings.
The hindwings are buffish with a black spot at the tornus (lower edge of the hindwing).
At rest, the species has a very distinctive profile with tufts of hairs protruding upwards from the thorax and the hind edge of the forewings (this latter feature shared with other prominents).
The margins of the forewings are also wavy.
This rather "lumpy" appearance has led to the rather fanciful comparison to the comb on a cock's head. 

Caught in my self made moth trap.

In my yard, Hilversum, The Netherlands, 20 May 2020