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Hidden Valley Wildlife Sanctuary, Norco, CA. 16 January 2011.
House Sparrow Fact Sheet and Call links below
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Hidden Valley Wildlife Sanctuary, Norco, CA. 16 January 2011.
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Lake Skinner County Park, Temecula, CA. 5 July 2015.
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Hidden Valley Wildlife Sanctuary, Norco, CA. 1 May 2005.