Thread subject: Diptera.info :: Campsicnemus, identity and behaviour

Posted by Oryctes on 27-11-2025 11:46
#1

www.galerie-insecte.org/galerie/image/dos366/big/DSC_7773%20A.jpg
Oryctes : France : Villeneuve-d'Ascq : 59650 : 17/09/2024
Altitude : NR - Taille : 4 mm environ
Réf. : 366804

www.galerie-insecte.org/galerie/image/dos366/big/DSC_7760%20A.jpg
Oryctes : France : Villeneuve-d'Ascq : 59650 : 17/09/2024
Altitude : 38 m - Taille : 4 mm environ
Réf. : 366779

www.galerie-insecte.org/galerie/image/dos366/big/DSC_7763%20A.jpg
Oryctes : France : Villeneuve-d'Ascq : 59650 : 17/09/2024
Altitude : NR - Taille : 4 mm environ
Réf. : 366780

Hello,
I found this Dolichopodidae of the genus Campsicnemus on the edge of a large pond in Villeneuve d'Ascq (Nord department in France) on September 17, 2024.
I would like to know its identity, if possible. I have already found several individuals of the species Campsicnemus scambus in the same area, but this male is different : I was thinking mainly of the species Campsicnemus curvipes, could it be this species ?
In fact, the insect had initially presented itself to me head-on, as shown in photos 2 and 3. I was surprised and intrigued by its behaviour : it repeatedly showed me alternately its intense green eyes and the bright blue back of its head. I wondered if it was just a coincidence or if it was a known behaviour with a specific meaning.
Thank you in advance for your opinions (please excusse the poor quality of the photos).
Dominique