Ashy Storm-Petrel is smaller and paler than the similar Black Storm-Petrel. Look for its diagnostic line of light-colored underwing coverts.
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Ashy Storm-Petrel
Bodega Bay, California
September 14, 2011 ©John Schwarz
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Ashy Storm-Petrel (note light underwing coverts)
Bodega Bay, California
September 14, 2011 ©John Schwarz
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Ashy Storm-Petrel
Bodega Bay, California
September 14, 2011 ©John Schwarz
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Ashy Storm-Petrel
Bodega Bay, California
September 14, 2011 ©John Schwarz
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Ashy Storm-Petrels (with Fork-tailed Storm-Petrel)
Bodega Bay, California
September 14, 2011 ©John Schwarz
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Ashy Storm-Petrel
Bodega Bay, California
September 14, 2011 ©John Schwarz
