1. Hooded Merganser Lophodytes cucullatus, first-year male, San Francisco, California, USA, December 6, 2003.  One of three birds present in Strybing Arboretum.  This individual has no yellow on the bill, suggesting it is a young male.

2. Hooded Merganser L. cucullatus, San Francisco, California, USA, December 6, 2003.  A different individual, this one has a moderate amount of yellow on the bill.

3. Hooded Merganser L. cucullatus, San Francisco, California, USA, December 6, 2003.  The third individual showing extensive yellow on the bill.

Updated March 03, 2004:

4. Hooded Merganser L. cucullatus, first-year male, San Francisco, California, USA, February 29, 2004.  This is presumably the same individual as in photograph 1 above, now almost three months later and with some white obvious behind the eye.

© Stephen J. Davies

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