Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Great Black-backed Gull adult November

Distribution range, source: IUCN

Justification:
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Great Black-backed Gull (Larus marinus) JL03 2006, 2009 & 2013, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Great Black-backed Gull (L. marinus) EENovember 11 2005, IJmuiden, the Netherlands. Picture: Ruud Altenburg.

Great Black-backed Gull (Larus marinus) ad, November 24 2006, Etaples, N France.