Chrysopilus cristatus is a fairly common species in damp, shady woodland found from May through until August.
Its larvae live in rotting wood and leaf litter where they are predators of other small insects and invertebrates.

1st & 2nd photo: A male. Zanderij Crailo, Hilversum, The Netherlands, 24 June 2013
3rd photo: A male. Gagelpolder, Utrecht, The Netherlands, 30 June 2021