Bill Walker:
California Sea Lion
Bill Walker:
Freighter on delta waterways
Bill Walker:
Reflections of the Antioch bridge
Bill Walker:
Ring-billed Gull
Bill Walker:
Herring Gull
Bill Walker:
Ring-billed Gull
Bill Walker:
Ring-billed Gull
Bill Walker:
Great Blue Heron
Bill Walker:
masts
Bill Walker:
masts
Bill Walker:
masts