1. Glaucous Gull Larus hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  A classic individual.  Note the heavy, pink bill with the  discrete, black, "dipped-in-ink" tip, the barred scapulars, the pale, finely barred tail and the mostly creamy white primaries and tertials.  GLGU_01

2. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  In this image and the next, notice the head shape - the gently sloping forehead and flat crown with an angle at the junction with the nape.  GLGU_02

3. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  Stocky, thick-necked and relatively short-winged.  GLGU_03

4. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  This bird was noticeably bigger than the accompanying Western Gulls L. occidentalis and Glaucous-winged L. glaucescens x Western hybrids.  GLGU_04

5. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above, showing upperpart detail.  Notice the spidery barring on the scapulars.  GLGU_05

6. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  The primaries are plain and creamy white.  GLGU_06

7. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  In this and the next image, notice how plain and pale the upperwings and tail are.  GLGU_07

8. Glaucous Gull L. hyperboreus, juvenile, Golden Gate Park, San Francisco, California, USA, November 10, 2000.  Same individual as above.  GLGU_08

© Stephen J. Davies

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