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Mononychus punctum-album

Posted by
Johan Dierckx (Wijnegem, Belgium) on 21 June 2012 in Animal & Insect and Portfolio.

Mononychus punctum-album (NL: Lissnuitkever, Lisboorder / EN: Iris seed weevil / DE: Weißpunktige Schwertlilienrüssler, Irisrüssler / FR: Charançon de l’iris des marais) is a species of beetle in the curculionidae family. The larvae of the Iris Seed Weevil lives in the seeds of the Yellow Iris (Iris pseudacorus), the adults are seen on other plants as well. In this image they are visiting a Ranunculus spec. In small numbers they do little damage, but may cause small holes in the buds of the flowers. So the flowers can look punctuated. When appearing in great numbers they may completely ruin an Iris, sometimes even causing the plant to die. The adult beetle is some 4 to 5 mm long and looks like many other small weevils. The basic colour is black, but the shields may be covered in dense, short brown hairs. Yet the species is easily identified by the white (sometimes yellow) spot near the beginning of the shields. Even though there is only one breed a year the little beetles live for a long time. The first adults appear in May, feeding and swarming. Mating takes place in May as well. In July females start to deposit their eggs in the developing seeds of the host plant. The larvae are very secure in the seeds, for Irisses will quickly fill all holes made by the beetle by producing a special liquid that fills up the holes. This liquid quickly hardens when in contact with air. The new adults appear in August and September, rapidly find a place in leaf litter and that is where they overwinter.

Image: Wijnegem (BE) – 20/05/2012

Canon EOS 400D 1/400 second F/5.6 ISO 200 150 mm

© Johan Dierckx

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k@ from Paris, France

A great encounter on top, love their "faces" ;)

21 Jun 2012 6:44am

Aubélia from Kortrijk, Belgium

Een prachtige momentopname. Ik wens je een aangename dag.

21 Jun 2012 7:25am

omid from mashhad, Iran

very nice & amazing!
so beautiful colors!!!

21 Jun 2012 8:57am

gogoli from Tehran, Iran

and interesting!
very nice colors and details!

21 Jun 2012 11:33am

john4jack from Corvallis, Oregon, United States


21 Jun 2012 11:10pm

Canon EOS 400D
1/400 second
ISO 200
150 mm