Great Black-backed Gull Larus marinus:

: a series of first-cycles from Massachusetts in January - added October 12, 2010 .
: a series of first-cycles from NE Scotland in January - added October 12, 2010 .
: first-basic (standing, flying) from Texas in February - added 2/24/06
: first-basic (standing) from Texas in December - added 12/21/06
: first-basic (standing, flying) from Texas in February - added February 21, 2007
: first-basic (standing) from Baltic Germany in November
: first-basic (flying) from England in March
: first-basic (standing) from England in March
: first-basic (dead; spread upperwings) from the Netherlands in April - added 04/25/00
: this imm. (standing) from Mexico in November is hard to age - comments?
: third-alternate (standing) from Delaware in August
: typical adult (standing) from Scotland in June