Slaty-backed Gull
Larus schistisagus Stejneger, 1884 (0, 1)
Photo © nachans from Tokyo, Japan, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons
STATUS
Coastal north-east, eastern Siberia and northern Japan. Monotypic.
OVERVIEW
First found in the Western Palearctic in the autumn of 2008 with all records adult or sub-adult.
BBRC RECORD
1). 2011 Essex/Greater London Rainham Landfill, 5CY+, 13th to 14th January, photo; presumed same, 16th to 17th and 20th to 26th February, photo; presumed same, Pitsea Landfill, 5CY+, 3rd and 19th February, photo; presumed same, Hanningfield Reservoir, 6th February, photo.
(R. G. Millington, Birding World 24 (1): 14-17, plates 1-5; R. G. Millington, Birding World 24 (2): 57-60, plates 1-3, 7 & 8; Birding World 24 (12): 514, photo; British Birds 105: plate 260; N. A. J. Hudson and the Rarities Committee, British Birds 109: 595, plate 322; BOURC (2017), Ibis 159: 239; D. Mitchell, British Birds 110: 405-413, plates 222-228).
