Slaty-backed Gull (schistisagus) / オオセグロカモメ / 큰재갈매기
(last update: December 2015)
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Please visit Aizawa's Blog for many more pictures!
Overall brown texture on underparts, extensive dark on tail and densely barred undertail coverts classic for Slaty-backed. Also hefty bill, head shape and small eye typical for this taxon.
These 1st cycles scared away the adult Glaucous-winged Gull.