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blackwater clubtail - Gomphurus dilatatus - male

blackwater clubtail - Gomphurus dilatatus - Male
Augusta, Savannah River, Richmond County, Georgia, USA
June 15, 2008
Is this a Blackwater Clubtail?

Black-shouldered Spinyleg
To me this looks more like a male Black-shouldered Spinyleg, Dromogomphus spinosus, because of the wide black area on the "shoulder" of the thorax, with only a thin yellow bar. The other clubtails usually have a thicker yellow/green bar on the shoulder. The shape of the backmost leg is consistent with Spinyleg also.

Thanks for the comment. It has thoracic stripes though (I brightened the picture so they can be seen better). I used that to rule out Black-shouldered Spinyleg (which I did see in the same area).

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