33RD REPORT OF THE CBRC: 2007 RECORDS 
that appeared too large for the Iceland Gull included one near Orick, HUM, 5 Jan 
2007 (2007-029) and one near Natural Bridges State Beach, SCZ, 16 Feb 2007 
(2007-009). Many members commented on the excellent written documentation in 
two records, from Morgan Hill, SCL, 10 Feb 2007 (2007-164) and Napa, NAP, 
21-26 Nov 2007 (2007-289). Most thought the identifications were likely correct 
but, given the difficulty inherent to the Iceland Gull, were unwilling to accept without 
photo documentation. A second-winter bird near Westmorland, IMP, 24 Feb 2007 
(2007-090) received minimal support because the photographs lacked detail sufficient 
for members to assess the bird’s plumage, structure, and age. 
LESSER BLACK-BACKED GULL Larus fuscus (47, 16). An astonishing and un- 
precedented 17 accepted records included 13 from the Salton Sea, where the influx 
comprised five adults, three third-winter, one second-winter, and four first-winter birds. 
Up to three adults were at Red Hill, IMP, 8 Oct 2006-23 Feb 2007 (PEL, GMcC; 
MJBt, MB, OJt, KHLf, CAM, DVPt, MMRt, RST; 2006-143), one of them inferred 
to be a returning individual present the previous winter 22 Feb-4 Mar 2006 (2006- 
023). Single adults at the Whitewater R. mouth at the north end of the Salton Sea, 
RIV, 6-17 Feb 2007 (JFe; OJ; 2007-082) and at the Alamo R. mouth, IMP, 18 Dec 
2007 (OJt; 2008-014) were judged by a majority of the committee to be birds differ- 
ent from those frequenting the Red Hill area. Additional records from the south end 
of the Salton Sea were of a second-winter bird at Obsidian Butte, IMP, 16 Jan 2007 
(GMcC; 2007-017), third-winter birds at Obsidian Butte, IMP, 10-24 Feb 2007 (MTH, 
GMcC; OJt, KHLt, DVPt; 2007-052), Red Hill, IMP, 10 Feb 2007 (GMcC; MTH, 
KHLt; 2007-053), and Obsidian Butte, IMP, 15 Nov 2007-10 Apr 2008 (GMcC; 
SGt, OJt DSSt, BLSt; 2007-260), and first-winter birds near Johnson’s Landing at 
Salton City, IMP, 22 Feb 2007 (ToEt; 2007-084), at the Alamo R. mouth, IMP, 23 
Feb 2007 (GMcC; 2007-062), at the north end of Poe Road, IMP, 8-25 Apr 2007 
(GMcC; EEt, RFot; 2007-099), and at the Alamo R. mouth, IMP, 28 Dec 2007 
(GMcC; 2007-305). Four additional records away from the Salton Sea were of third- 
winter birds at Kaweah and Bravo L., TUL, 3-24 Feb 2007 (JLot; 2007-070) and 
Doheny State Beach, ORA, 11 Feb 2007 (M&NFt; 2007-091), a second-summer 
bird at Bolsa Chica, ORA, 10 Jun-18 Aug 2007 (BEDt; MSanM; 2007-167) that 
represents the first summer record for California, and a second-winter bird at Owens 
L., INY, 18-20 Nov 2007 (SSt; JLDf, TH, J&DPf, RStt; 2007-294). 
IDENTIFICATION NOT ESTABLISHED: Photographs and written details of an 
adult at Salton City, IMP, 23 Oct 2007 (2007-235) were contradictory and failed to 
support the identification to most committee members’ satisfaction. 
SLATY-BACKED GULL Larus schistisagus (29, 13). Thirteen records during the 
winter of 2006-2007 brought the total number of accepted records to a staggering 
29, all but two since 2005. A third-winter bird near Fort Dick, DN, 26 Feb-3 Mar 
2007 (ABt,KBf, KRt; 2007-065) was joined by an adult 3 Mar 2007 (RFt; 2007- 
104). A third-winter bird was at the mouth of Humboldt Bay, HUM, 31 Dec 2006-2 
Jan 2007 (ToE; JEH; 2007-055), and an adult was at Redwood Cr. mouth near 
Orick, HUM, 2 Jan 2007 (ToEf; JEH; 2007-056). A massive gull flock attracted to 
a herring run at the west end of the Richmond-San Rafael Bridge, MRN, on 19 Feb 
2007 included an adult (ToEf; DSSt; 2007-057) and a second-winter Slaty-backed 
(ToEf; DSSt; 2007-058). Up to five at Venice Beach in Half Moon Bay, SM, included 
adults 5 Jan-21 Feb 2007 (AJt; SBT; 2007-008) and 6-22 Mar 2007 (RSTh; JBat, 
DHet, AJt, PEL; 2007-069) and second-winter birds 13-30 Jan 2007 (AJt; RSTh; 
2007-014), 6-17 Mar 2007 (RSTh; JBat, DSSt; 2007-102), and 9-17 Mar 2007 
(DSSt; 2007-103). A second-winter bird at Pt. Pinos, MTY, 5 Feb 2007 (BLSt; 
2007-072; photo in N. Am. Birds 61:324) was followed by an adult at the Salinas 
R. mouth, MTY, 13 Feb 2007 (DVPt; 2007-071). 
IDENTIFICATION NOT ESTABLISHED: Two earlier records were re-reviewed in 
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