Large Pincertail Onychogomphus uncatus

Scientific Name: Onychogomphus uncatus (Gomphidae).

English Name: Large Pincertail (Clubtails and pincertails family).

French Name: Le Gomphe à crochets (='the Gomphid with hooks').

5 Key Characters:
  •  males have yellow pincers at the end of their abdomens.
  • no yellow stripe between the eyes.
Lookalikes: Other Gomphids, especially Small Pincertail Onychogomphus forcipatus. This is the only place in Europe where so many Gomphids can be seen in the same area.

Habitat: Smaller, shady streams.

Flight Period: June-July-August-September.

Status: Rare.

Photographed by Loire Valley Nature:


  1. Anal triangle has four windows
    The lower pincer is smoothly curved and finishes INSIDE the two side pincers

    1. Thanks Tim. As you can see by the brevity, this is just a stub (as Wikipedia would say...). Because I was tweaking the Gomphids it seemed the best idea to get this up. I'll finish it and put in a photo shortly.

    2. You know that you can always use my pix... until you get your own, naturally.
      All my pix are Creative Commons / Credited, No Alterations, No Commercial Use...
      even if they aren't tagged as such... trying to re-tag past pix in Fumblr and the like is a pain as you cannot do so in bulk!!