33RD REPORT OF THE CBRC: 2007 RECORDS 
Figure 13. Although superficially similar to North America’s resident Carpodacus 
finches, this Common Rosefinch (C. erythrinus) photographed in hand on Southeast 
Farallon I., San Francisco County, 23 September 2007, is readily identified the 
combination of short stubby bill with a strongly decurved maxilla, a blank-faced 
appearance created by a lack of any strong markings such as a supercilium, greenish 
or olive tones to much of the plumage, especially on the flight-feather edges, a lack 
of streaking on the undertail coverts (not visible here), and a notched tail. 
Photo by Kristie Nelson 
with our current understanding of what constitutes a Slaty-backed Gull. At least one 
member believed strongly this individual was one of the Lesser Black-backed Gulls 
breeding in northern Siberia (though not close to the Bering Sea), L. fuscus heuglini 
or taimyrensis. Four additional records were rejected because written documentation 
was insufficient or photographs were inconclusive or nonexistent: of second-winter 
gulls at San Rafael, MRN, 19 Feb 2007 (2007-059), Fort Dick, DN, 31 Mar-14 Apr 
2007 (2007-089), and the Smith R. bottoms, DN, 7-13 Nov 2007 (2007-255) and 
an adult at Crystal Springs Reservoir, SM, 25 Nov 2007 (2007-283). 
BRIDLED TERN Onychoprion anaethetus (2, 1). A well-documented adult at the 
Santa Margarita R. mouth, SD, 14-23 Aug 2007 (TABf, PAG, ELKt, GMcC, MSt; 
2007-161; photo in N. Am. Birds 62:191) was only California’s second and the 
first to be photographed. 
IDENTIFICATION NOT ESTABLISHED: The written description of a bird at south 
San Diego Bay, SD, 11 Aug 2007 (2008-037), while suggestive, lacked detail suf- 
ficient to persuade the committee that the identification was correct. 
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