Juvenile moulting into first-winter Black-headed Gull at Wajima. In first-winter plumage the larger and proportionately longer-winged form involved sibiricus generally has a paler and weaker carpal bar and a narrower and often less clear tail-bar than ridibundis (Olsen&Larsson).
First-winter (foreground and two in background) and second-winter (middle) Black-tailed Gulls at Wajima
First-winter Black-tailed Gull at Wajima
Second-winter Black-tailed Gulls at Wajima
Third-winter Black-tailed Gull at Wajima
Species noted:
Streaked Shearwater 5
Japanese Cormorant 12
Black-eared Kite 50
Black-headed Gull 4
Slaty-backed Gull 1 juvenile
Rock Dove 10
Black-backed Wagtail 1
Japanese Wagtail 2
Brown-eared Bulbul 5
Blue Rock Thrush 2
Eastern Great Tit 4
Japanese White-eye 3
Bull-headed Shrike 1
Jay 2
Carrion Crow 20
Large-billed Crow 2
Tree Sparrow 20
Meadow Bunting 5