![Western Gull (front) with 1st cycle Glaucous Gull](https://a4.pbase.com/g6/38/465938/3/73833292.gA3Aryce.jpg) Western Gull (front) with 1st cycle Glaucous Gull |
![Herring Gulls, both 1st cycle](https://a4.pbase.com/g6/38/465938/3/73275061.pffvGxN7.jpg) Herring Gulls, both 1st cycle |
![front to rear: adult Herring Gull, 1st cy Herring Gull, adult Western Gull](https://a4.pbase.com/g6/38/465938/3/73275049.blUEBmZ5.jpg) front to rear: adult Herring Gull, 1st cy Herring Gull, adult Western Gull |
![Thayer's Gull (rear) with Herring Gull, both 1st cycle](https://a4.pbase.com/g6/38/465938/3/73275048.T8fG0zOZ.jpg) Thayer's Gull (rear) with Herring Gull, both 1st cycle |
![California Gull (front) with Thayer's Gull, both 1st cycle](https://a4.pbase.com/g6/38/465938/3/73275043.9ij7y1UX.jpg) California Gull (front) with Thayer's Gull, both 1st cycle |
![Front to rear: cy1 GW x HERG, cy1 Thayer's Gull, cy2 Glaucous-winged Gull](https://a4.pbase.com/g3/38/465938/3/56693240.Waddell_7993.jpg) Front to rear: cy1 GW x HERG, cy1 Thayer's Gull, cy2 Glaucous-winged Gull |
![Left to right: cy1 Thayer's Gull, presumed cy1 Glaucous-winged x Western Gull, 1st cycle](https://a4.pbase.com/g3/38/465938/3/56693295.Waddell_8008.jpg) Left to right: cy1 Thayer's Gull, presumed cy1 Glaucous-winged x Western Gull, 1st cycle |
![Left to right: adult Western Gull, 1st cycle Thayer's Gull](https://a4.pbase.com/g3/38/465938/3/56693307.Waddell_8009.jpg) Left to right: adult Western Gull, 1st cycle Thayer's Gull |
![Left to right: 3rd cycle & 2nd cycle Herring Gulls](https://a4.pbase.com/g3/38/465938/3/56693473.Waddell_7991.jpg) Left to right: 3rd cycle & 2nd cycle Herring Gulls |
![Front to rear: cy2 Herring Gull, with probable cy3 GW x WEGU](https://a4.pbase.com/g3/38/465938/3/56731780.Waddell_8002.jpg) Front to rear: cy2 Herring Gull, with probable cy3 GW x WEGU |
![presumed GW x HERG (left) & GWGU, both 1st cycle](https://a4.pbase.com/g3/38/465938/3/56726047.Waddell_8004.jpg) presumed GW x HERG (left) & GWGU, both 1st cycle |
![Thayer's Iceland Gull, adult center. From top to bottom: Western, Thayer's, Glaucous-winged, all basic adults](https://a4.pbase.com/g3/38/465938/3/53717170.CaB8280104a.jpg) Thayer's Iceland Gull, adult center. From top to bottom: Western, Thayer's, Glaucous-winged, all basic adults |
![Thayer's Iceland Gull (right) with presumed Glaucous-winged x Western Gull, both basic adults](https://a4.pbase.com/g3/38/465938/3/52718126.RdM13c181104.jpg) Thayer's Iceland Gull (right) with presumed Glaucous-winged x Western Gull, both basic adults |
![pale-eyed Western gull, 2nd cycle with adult Herring Gull](https://a4.pbase.com/g3/38/465938/3/56726251.RdM_6830.jpg) pale-eyed Western gull, 2nd cycle with adult Herring Gull |
![Front to rear: presumed adult GW x WEGU with presumed cy2 GW x HERG](https://a4.pbase.com/g6/38/465938/3/73768123.Xh8IriR9.jpg) Front to rear: presumed adult GW x WEGU with presumed cy2 GW x HERG |
![presumed GW x WEGU (left) with WEGU, both basic adult](https://a4.pbase.com/g3/38/465938/3/120578746.PLHGwjcN.jpg) presumed GW x WEGU (left) with WEGU, both basic adult |
![left to right: GW x HERG, GWGU, GW x WEGU, all adults](https://a4.pbase.com/g6/38/465938/3/74175640.mXorELxY.jpg) left to right: GW x HERG, GWGU, GW x WEGU, all adults |
![front to rear: 1st cy GWGU, 1st cy THGU, adult WEGU](https://a4.pbase.com/g1/38/465938/3/93425787.M7PNp4Xq.jpg) front to rear: 1st cy GWGU, 1st cy THGU, adult WEGU |
![GW x WEGU (left) with GWGUs & WEGUs](https://a4.pbase.com/g6/38/465938/3/76001560.57UuV4M3.jpg) GW x WEGU (left) with GWGUs & WEGUs |
![Herring Gull (center & lower left) with HERGs & THGUs all adults](https://a4.pbase.com/g3/38/465938/3/90126522.GM29LX0v.jpg) Herring Gull (center & lower left) with HERGs & THGUs all adults |
![Herring Gull (front) with THGU, both adults](https://a4.pbase.com/g3/38/465938/3/90126515.TnG1YOyx.jpg) Herring Gull (front) with THGU, both adults |
![Thayer's Gull (center) with Herring Gulls, all adults](https://a4.pbase.com/g3/38/465938/3/90126527.NzOyyMIz.jpg) Thayer's Gull (center) with Herring Gulls, all adults |
![Thayer's Gull or Herring Gull adult?](https://a4.pbase.com/g3/38/465938/3/90126624.cj8DhP4u.jpg) Thayer's Gull or Herring Gull adult? |
![Western Gulls with with presumed Herring Gull (right)](https://a4.pbase.com/g1/38/465938/3/131112689.SFhK7qHF.jpg) Western Gulls with with presumed Herring Gull (right) |
![Glaucous-winged Gulls: 2nd cycle (left), 1st cycle (right)](https://a4.pbase.com/g1/38/465938/3/131127195.ReOh3yKk.jpg) Glaucous-winged Gulls: 2nd cycle (left), 1st cycle (right) |
![possible Kumlien's Iceland Gull, 1st cy (center)](https://a4.pbase.com/g1/38/465938/3/92389254.O4VFLx3G.jpg) possible Kumlien's Iceland Gull, 1st cy (center) |
![Primary patterns of 3 adult Thayer's Iceland Gulls](https://a4.pbase.com/g3/38/465938/3/57431985.RdM9y151204.jpg) Primary patterns of 3 adult Thayer's Iceland Gulls |
![Dorsal primary patterns of adult Herring and Thayer's Iceland Gulls - P10 on HERG not fully grown](https://a4.pbase.com/g3/38/465938/3/57435290.RdM_7250z.jpg) Dorsal primary patterns of adult Herring and Thayer's Iceland Gulls - P10 on HERG not fully grown |