Bonaparte's Gull Fact Sheet and Call links below
1st Cycle. Prado Regional Park, Chino Hills, CA. 31 December 2011.
1st Cycle. Prado Regional Park, Chino Hills, CA. 31 December 2011.
Andrée Clark Bird Sanctuary, Santa Barbara, CA. 18 November 2006..
Andrée Clark Bird Sanctuary, Santa Barbara, CA. 18 November 2006..