Laguna Niguel Regional Park, Orange Co., 4-06. © John  C. Avise.

Northern Rough-winged Swallow

Stelgidopteryx serripennis

Passeriformes, Hirundinidae

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San Joaquin Marsh, Orange Co., 3-07. © John  C. Avise.
San Joaquin Marsh, Orange Co., 5-07. © John  C. Avise.