Bonaparte’s Gull Chroicocephalus philadelphia   [Ord, 1815]

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Order: Charadriiformes Family: Laridae
BTO Codes: ON, BONGU EURING No: 5810
Number in Britain: 3 records/year
Conservation Status:
UK: Not Assessed
European: Not evaluated
Global: Least Concern ( Details )
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Status in UK: (A)  Accidental
Subspecies: Monotypic
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Length: 29 cm Wingspan: 95 cm Weight: M/F: 210 g    
Scientific name from: Gr.: kroikos=coloured + kephale=head and after Philadelphia, Pennsylvania
World Distribution: BREEDS: N North America, WINTERS: south to Mexico
Habitat: Coniferous woodland, winter coasts, lakes, marshes
Diet: Small fish, crustaceans and insects
TitBit: The name honours Charles Lucien Bonaparte, who made important contributions to American ornithology, it is also the only gull to nest regularly in trees.  

Records and Distribution

First Record: Clyde, 1850 (Down, 1848)
Total Number of Records (1950-2007): 125 Summary of Records by Year
Most Likely to Occur in: Any month
Most Recent County Records:
   Scotland: Argyll (1975), Angus & Dundee (2007), Clyde (1850), Fife (2006), Highland (2004), Lothian (1998), Moray & Nairn (2007), Northeast (2007), Outer Hebrides (2007), Shetland (2005),
   North-east England: Cleveland (2006), Durham (1987), Northumberland (2006), East Yorkshire (1999), North Yorkshire (1969), West Yorkshire (2003),
   North-west England: Cheshire (2004), Lancashire (2001),
   English Midlands: Derbyshire (2000), Staffordshire (1996), Warwickshire (1992),
   Eastern England: Essex (1994), Norfolk (2007),
   South-east England: Hampshire (2003), Kent (2001), Greater London (1983), Oxfordshire (2007), Surrey (1983), East Sussex (1951), West Sussex (2002),
   South-west England: Cornwall (2006), Devon (2007), Dorset (2006), Gloucestershire (2006), Somerset (2006), Isles of Scilly (2006),
   Wales: Anglesey (1998), Ceredigion (2004), Caernarfonshire (1984), Flintshire (1994), Glamorgan (2006), Gower (2004), Pembrokeshire (1997),

Information provided by BirdGuides and BBRC

Other Names

Previously Larus philadelphia 
Gaelic: Welsh: Gwylan Bonaparte
Danish: Bonapartemåge Dutch: Kleine Kokmeeuw
Finnish: Mustahuppulokki French: Mouette de Bonaparte
German: Bonapartenmöwe Hungarian: Bonaparte sirálya
Icelandic: Trjámáfur Irish: Sléibhín Bonaparte
Italian: Gabbiano di Bonaparte Norwegian: Kanadahettemåke
Polish: Mewa kanadyjska Portuguese: Gaviota de Bonaparte
Spanish: Gaviota de Bonaparte Swedish: Trädmås

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Wikipedia entry
BirdLife species page
Recent sightings and information from BirdGuides
All About Birds (Cornell Lab of Ornithology)
Gough, G.A. et al. (1998) Patuxent Bird Identification Infocenter