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Large syrphid - Sericomyia chalcopyga

Large syrphid - Sericomyia chalcopyga
Mount Rainier National Park, Mt. Rainier National Park County, Washington, USA
September 2, 2010
Size: 1.6 cm

Moved from Sericomyia.

Moved from ID Request.

"Flower Fly"
It is a male specimen of Sericomyia sp. (Syrphidae).

so long,

Sericomyia chalcopyga
Hello. It's Sericomyia chalcopyga.

Thanks Bjoern. I appreciate the id. How can you tell it is a male? Are they dimorphic? Or is there a visible ovipositor on the female?

male have holoptic eyes, mean
male have holoptic eyes, meaning the eyes meet on top of the head, females are dichoptic, meaning the eyes are separated on top of the head. Works for many Syrphid genera, but not for Helophilus...

sex differentiation
Thanks! That's a neat thing to know.

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