Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A worldwide community photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Common Bluet

Enallagma cyathigerum


Can anyone identify these gorgeous damselflies? The apparent lack of sexual dimorphism is really confusing me.. Is it a Coenagrion, an Enallagma, an Erythromma or neither of those?

1 Species ID Suggestions

taka.ita 10 years ago
Common Bluet
Enallagma cyathigerum Common Bluet - Enallagma cyathigerum |

Sign in to suggest organism ID


PedroNicolau 10 years ago

Thanks taka.ita, I guess you're right. But I'm lacking a damselfly guide to fully id them so I'll just keep looking.

taka.ita 10 years ago

If you look at the photo you'll see that the female is quite different from the male in terms of pattern on the abdomen. The male has small dark rings in the blue, the female has torpedo-like figures.

One very important lesson when id-ing dragonflies/damselflies is that the pattern is much more important than the color. In fact most species can be identified from black-and-white photos.

PedroNicolau 10 years ago

Mary, when I said I didn't think it was an Enallagma, I was referring to E. cyathigerum which Madalena suggested, so I apologize.
To be honest, I know nothing about damselflies, I was just "excluding" the other hypothesis because apparently E. cyathigerum has a really marked sexual dimorphism, which these specimens don't have.

May I ask you why do you think it's a Circumpolar Bluet?

By the way, thanks for the help!

MaryAnnGlassicVarley 10 years ago

Honestly, I think it is a Circumpolar Bluet ,Enallagma cyanigerum, but if you don't think it's a Enallagma,I don't know what to say.

PedroNicolau 10 years ago

Thanks for the ID Madalena but I don't think it's an Enallagma. That species apparently have huge sexual dimorphism, with the female being brown. This one is seemingly blue, I mean both look very similar.
I looked up other possible genus that occur in Portugal and put them in the description. Maybe someone else will be able to help..

Spotted by

Algarve, Portugal

Spotted on Apr 6, 2009
Submitted on Jul 8, 2013

Related Spottings

Bluet Bluet Bluet Common Blue Damselfly

Nearby Spottings

Spotting spaanse margriet (Osteospermum ecklonis) European Rabbit Scarlet pimpernel
Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team