1. Yellow-billed Loon Gavia adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.  Note the pale distal half to the culmen.

2. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.  The upperparts are heavily worn but the few remaining pale feather edges suggest this might be a first-summer bird.

3. Yellow-billed Loon G. adamsii, Moonglow Dairy, Monterey County, California, USA, May 9, 2004.  Arching the neck upwards in preparation for a dive.  Note the dark collar on the lower fore neck.

4. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

5. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

6. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

7. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

8. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

9. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.  During two hours of observation, the loon frequently reared up in the water to stretch and flap its wings but it did not take flight at any point.

10. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

11. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.  While the head is a little overexposed in the bright, late afternoon sun, this shot shows the extent of the dark collar on the lower fore neck.

12. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

13. Yellow-billed Loon G. adamsii, Moonglow Dairy, Elkhorn Slough, Monterey County, California, USA, May 9, 2004.

14. Yellow-billed Loon G. adamsii, with Western Grebe Aechmophorus occidentalis, Moonglow Dairy, Monterey County, California, USA, May 9, 2004.  A slightly soft image, but shows the considerable difference in size between these two species.

For photos of a juvenile Yellow-billed Loon in Arizona, click here.

© Stephen J. Davies

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