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Species · Birds

Bonaparte's Gull

Chroicocephalus philadelphia

1,770Records since 2000
JulyPeak month
45Counties with records

When it is recorded

Jan74
Feb63
Mar135
Apr302
May251
Jun115
Jul410
Aug263
Sep61
Oct34
Nov36
Dec26

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

Where it is recorded

#CountyNationRecordsShare
1Kent England699
2Cornwall England102
3Dorset England88
4Oxfordshire England54
5Lincolnshire England43
6Devon England39
7Norfolk England30
8Essex England29
9Rutland England26
10Somerset England25
11Gloucestershire England25
12Leeds England23
13Shetland Islands —18
14Causeway Coast and Glens Northern Ireland16
15Mid and East Antrim Northern Ireland15
1,584 England67 Scotland75 Wales42 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 45 counties in all.

About this species

Records since 2000
1,770
Peak month
July
Counties with records
45
Scientific name
Chroicocephalus philadelphia
Group
Birds
NBN Atlas records since 2000
67
Most recorded in
Kent, Cornwall, Dorset, Oxfordshire
Kingdom
Animalia
Phylum
Chordata
Class
Aves
Order
Charadriiformes
Family
Laridae
Genus
Chroicocephalus
Name with authority
Chroicocephalus philadelphia (Ord, 1815)
Described
1815
Contributing datasets
7

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q629525 · GBIF 6065818