<https://forums.whatbird.com/index.php?/topic/19011-so-cal-offshore/#comment-123735>
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"There are no Pterodroma gadfly petrels in your photos. FYI - On any West Coast pelagic, if you encountered one, you would know it since the majority of the boat would freak out. While more likely in Southern CA than here in Northern CA, any Pterodroma  sp. is always a good pelagic bird in CA.\n \n\n\n\tThe gull is a Western.\n \n"
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