Skip to content
The UK Bird Atlas

Caspian Gull (Larus cachinnans)Where and when to see it in the UK

Status not yet classified · reporting peaks August · Skimmers, Noddies, Terns, and Gulls · BOU category A

Records to 2026-08-16 · build 2026-08-31

Caspian Gull (Larus cachinnans)
Marek Szczepanek, CC BY-SA 3.0, via Wikimedia Commons
Peak months
Caspian Gull: relative reporting rate by 10 km square, September

Contains OS data © Crown copyright and database right 2026 (grid squares, place names from OS Open Names). Northern Ireland place names: OSNI Open Data, OGL v3.0. County and country boundaries: Office for National Statistics, Open Government Licence v3.0. Coastline: Natural Earth. Bird records from the data partners listed here.

Caspian Gull has been recorded in 431 of the 2,971 10 km squares covering UK land (15%) in records to 2026. Its strongest squares are in England, Wales and Scotland. Reporting peaks in August.

Conservation status: Least Concern (IUCN Red List, LC)
View on the IUCN Red List
Relative to this species' best squares (how classes are calculated)
Very high
10% or more of visits
High
2% to 10%
Moderate
<1% to 2%
Low
under <1%
Surveyed, not recorded
at least 20 qualifying visits, no record
Insufficient records
too few visits to say
Lighter fill
Few visits, lower confidence
Small dot
Occasional: a single record, or out of season

Seasonality

Reporting rate by month, relative to the peak month
MonthRelative to peakShare of visitsTypical class
January 87%<1%High
February 73%<1%High
March 41%<1%Low
April 18%<1%Low
May 14%<1%Low
June 13%<1%Low
July 38%<1%Moderate
August 99%<1%High
September 79%<1%High
October 59%<1%Moderate
November 78%<1%Very high
December 100%<1%Very high

Squares with the highest reporting rate in January

SquareWhereShare of visitsClass
NZ36South Tyneside, England100%Very high
NZ53Hartlepool, England100%Very high
SD34Lancashire, England100%Very high
SE51Doncaster, England100%Very high
SE83East Riding of Yorkshire, England100%Very high
SJ28Wirral, England100%Very high
SK48Rotherham, England100%Very high
SK51Leicestershire, England100%Very high
SK69Doncaster, England100%Very high
SK74Nottinghamshire, England100%Very high

Spotted an error in a square? Report it and it goes into the review queue. Read the methodology for how classes, flags and sensitive-species rules work. Data to 2026.