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Syrphus opinator is a species of flies in the family Syrphidae. They visit flowers of Great Valley gumweed, California Bay Laurel, snowbrush ceanothus, and false london rocket. They are diurnal.

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EOL has data for 8 attributes, including:

Known occurrences, collected specimens and observations of Syrphus opinator Osten Sacken 1877. View this species on GBIF