In the Red List of the International Union for Conservation of Nature from 2020, the Camberwell BeautyNymphalis antiopa (Linnaeus, 1758)Mourning CloakCamberwell Beauty is listed as a
Least Concern (LC)
this means the butterfly is classified as not endangered across Europe van Swaay; Cuttelod; Collins; Wynhoff; Verovnik; Wiemers; López Munguira; Maes; Šašić; Verstrael; Warren; Settele, 2010 - European Red List of Butterflies:
This species is listed as Least Concern, as it has been evaluated against all the IUCN criteria and does not meet, nor is it close to meeting (e.g. populations have not been declining by more than 25% in the past 10 years), the thresholds for any category of threat.
See also: IUCN Red List - Mourning Cloak