Visual migration – Purple Martin in Point Loma

Purple Martin – Point Loma, San Diego County, California 29 Aug 2015 (© Gary Nunn)

Purple Martin – Point Loma, San Diego County, California 29 Aug 2015 (© Gary Nunn)

Orange-crowned Warbler form sordida – Point Loma, San Diego County, California 29 Aug 2015 (© Gary Nunn)

Orange-crowned Warbler form sordida – Point Loma, San Diego County, California 29 Aug 2015 (© Gary Nunn)

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