All pictures copyright Clive Harris,
Japan Gulls February 2010
See the following:
2CY Vega (L) and Slaty-backed (R)
2CY Slaty-backed (L) and Glaucous-winged (R)
2CY: Faded Slaty-back or Hybrid?
2CY: Glaucous x Glaucous-winged?
Glaucous 3CY (L) and Slaty-backed (R)
Glaucous-winged, Slaty-backed and Black-tailed
Slaty-backed (L) and Vegas (R)