Black Storm-Petrel is larger, darker, and longer-winged than the similar Ashy Storm-Petrel.
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Black Storm-Petrel (note very long wings)
San Diego pelagic trip
September 2, 2014 ©John Schwarz
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Black Storm-Petrel
San Diego pelagic trip
September 2, 2014 ©John Schwarz
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Black Storm-Petrel
Offshore Bodega Bay, California
September 14, 2011 ©John Schwarz
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Black Storm-Petrel
Offshore Bodega Bay, California
September 14, 2011 ©John Schwarz
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Black Storm-Petrel
Offshore Bodega Bay, California
September 14, 2011 ©John Schwarz
