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Slaty-backed Gull (Larus schistisagus):

: another good candidate from Texas; a first-cycle (standing, flying) from Feb added 03/14/12
: my best candidate yet for a first-cycle (standing, flying) from Texas (Feb) added 02/21/07
: another possible 1st-basic (standing, flying) from Texas (Feb) added 02/24/06
: possible 1st-basic (standing, preening, flying) from Texas (Nov) added 11/23/02
: 1st-basic (standing) from Japan (Jan) 10/10/99
: 1st-basic (standing) from Japan (Jan) 10/10/99
: 1st-basic/alternate (standing) from Hong Kong (Mar) added 09/14/00
: four first-alternates (standing, flying) from Gambell, Alaska in Sep. - updated 6/24/00
: two first-alternates/2nd-basics (standing) from western Alaska in Sep. - added 6/19/00
: first-alternate (standing) from Nome, Alaska in Aug. - added 4/09/00
: two 2nd-alternates/3rd-basics (standing) from Nome, Alaska in Aug. - added 6/19/00
: is this a 2nd-basic (standing) from Korea in Feb? - added 3/30/00
: a 2nd-basic (standing, flying) from Texas (Feb) added 02/24/06
: 2nd-basic (standing) from Japan (Mar)
: 2nd-basic (standing) from Japan (Jan) 10/10/99
: a 3rd-basic (standing, flying) from Texas (Feb) - added 6/22/00
: 3rd-alternate (standing) from Alaska in Aug - added 3/30/00
: adult-basic (standing) from Japan (Jan) 10/10/99
: 2 adult-basics (standing) from Korea in Feb - added 3/30/00
: 2 adult-alternates (standing) from Alaska in Aug - added 3/30/00
: adult-basic (standing) from Washington State (Nov) - added 4/13/00
: 3 adult-alternates/basic (standing, flying) from Alaska in Aug - added 6/24/00
: 5 summer birds of various ages from Alaska in Aug/Sept - added 1/15/08
: adult-basic (standing) from West Texas (Dec) - updated 12/11/03