Black-headed Gull

Chroicocephalus ridibundus

1,071,610Records since 2000

JanuaryPeak month

127Counties with records

Least ConcernIUCN Red List

When it is recorded

Jan122,680

Feb90,152

Mar92,522

Apr82,799

May80,993

Jun67,570

Jul80,212

Aug87,415

Sep87,461

Oct98,242

Nov88,201

Dec90,333

GBIF records by month, 2000–2025 (all years combined).

#	County	Nation	Records
1	Cambridgeshire	England	69,046
2	Norfolk	England	53,746
3	Suffolk	England	37,790
4	Kent	England	33,205
5	Surrey	England	22,665
6	Essex	England	22,164
7	East Riding of Yorkshire	England	20,703
8	Lincolnshire	England	20,386
9	Oxfordshire	England	18,999
10	Dorset	England	17,880
11	North Yorkshire	England	16,536
12	Cornwall	England	14,873
13	Rutland	England	13,084
14	Nottinghamshire	England	12,767
15	Leeds	England	12,007

942,685 England92,208 Scotland25,988 Wales8,865 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 127 counties in all.

Records since 2000: 1,071,610
Peak month: January
Counties with records: 127
IUCN Red List: Least Concern
Scientific name: Chroicocephalus ridibundus
Group: Birds
NBN Atlas records since 2000: 403,312
Most recorded in: Cambridgeshire, Norfolk, Suffolk, Kent, Surrey, Essex, East Riding of Yorkshire, Lincolnshire, Oxfordshire, Dorset, North Yorkshire, Cornwall +115
Conservation designations: Birds Directive, Birds of Conservation Concern, Biodiversity List – Northern Ireland, Convention on Migratory Species, GB Red List (2001 IUCN criteria), Biodiversity List – Wales, Scottish Biodiversity List
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Chroicocephalus
Name with authority: Chroicocephalus ridibundus (Linnaeus, 1766)
Described: 1766
Contributing datasets: 70