Blue Dasher is a skimmer. It's very common in San Mateo County. Look for its white face which distinguishes it from Western Pondhawk's green face. It can be seen most of the year at ponds and lakes.
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(c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
(c) Leslie Flint, all rights reserved, uploaded by Leslie Flint
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