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Slippery Slope for Sloppy Sleuths


Slippery Slope for Sloppy Sleuths
Photo Information
Copyright: Dietrich Meyer (meyerd) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 585 W: 64 N: 2238] (7531)
Genre: Animals
Medium: Color
Date Taken: 2010-06-24
Categories: Insects
Camera: Konika Minolta Dynax 7D, Minolta AF 100 Macro & Kenko tube
Exposure: f/16, 1/125 seconds
Details: (Fill) Flash: Yes
Photo Version: Original Version
Date Submitted: 2010-09-23 1:12
Viewed: 2675
Points: 12
[Note Guidelines] Photographer's Note
Back in my backyard:

The 6 mm long Harlequin ladybird (Coleoptera; Coccinellidae; Harmonia axyridis ; Asiatischer Marienkäfer; Coccinelle asiatique) has established itself in great numbers on my Plum trees. You may notice that the leaves are curled, a clear sign of Aphid presence.

The animal had a Japanese- East Asiatic distribution originallly. Because of its efficient predation of fruit-tree aphids the animal had been introduced as a biological agent in the USA at the beginning of the 20th century. In Europe (Belgium) it was accidentally discovered in 2001. Since that time the species has been invasive and has now colonized all European countries, since 2008 my backyard.

Entomologists worry about the great voracity of this Ladybird, they are afraid that it might push some indigenous insect species out of existence. So maybe the story will go like this: introduced fruit trees are controlled by accidentally introduced Aphids that are controlled by accidentally introduced Coccinellids that will have to be controlled by introduced beetle parasites ... and so on in eternam?

ID: the larvae are easily recognized by the orange pattern on the back . The multicolor (Harlequin) pattern of the adults varies greatly. A quite regular occurrence on the prothorax is the black "W" -like sign on white background. The overall color pattern carries the simple message: "Leave me alone, I am impalatable". Indeed, the beetle contains the bitter tasting 2-Isopropyl-3-methoxypyrazin: talk about chemical warfare!

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ThreadThread Starter Messages Updated
To ingridshaul: Spaessemeyerd 2 09-27 00:44
Animal Behaviouringridshaul 1 09-23 07:00
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Critiques [Translate]

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5038 W: 260 N: 15594] (50626)
  • [2010-09-23 1:40]

Hello Dietrich,
Nice alliterative title for this fine macro of these this species of invasive Ladybird, a pair in copulo.
The features and individual variation are well shown with fine sharpness and colours with not too much reflection from the use of flash.
Thanks and kind regards,
Ivan

A stunning shot of these ladybirds in love, Dietrich!
Excellent pose, timing and frame!
Nice to be your neighbour!
Cheers!
Goldy

  • Great 
  • joska Gold Star Critiquer/Gold Note Writer [C: 806 W: 0 N: 4092] (22535)
  • [2010-09-23 5:40]

Hi Dietrich,
Excellebnt photo of this Harmonia axyridis, great natural colors and very fine details, TFS!

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2010-09-23 6:48]

Hi,
Interesting image of mating pair of ladybugs, fine colors. tfs.
nagraj.v

Lieber Dieter,
Dir geht es augenscheinlich besser - Du machst Spaesse!!
Hoffe, Du hast oder wirst meine ''Baldige Besserung'' via Anne erhalten.

Ich hoffe besonders, Menschen werden aufhoeren, in die Natur sich einzumischen! Jedes Mal - wenn irgendwo etwas eingefuehrt wird - um eine Plage los zu werden - wird die neue Pflanze oder Tiere selbst eine Plage!!

Erstens, Menschen wissen zu wenig, was in der Natur vor sich geht. Zweitens die Tiere lesen nicht dieselbe Fachliteratur wie die sogenannten Experten...

Bezueglich Deines Photos, die Farbe der Marienkaefer is ganz unglaublich sowie auch der Koerper - sieht aus wie Plastik. Bemerkte zuvor (am Lago Maggiore) die Variationen in Farbe der einheimischen Marienkaefer sowie auch Markierungen: viele nur Punkte/Kleckse, andere ganz abstrakte Malereien...

Schoenen Dank fuer den interessanten Beitrag und lehrreichen notes.

Liebe Gruesse
Ingrid

Hello Dietrich,
A great shot... but a not good news of this invasive species! Impressive details of this couple of Harmonia axyridis mating, with fine details of their heads. TFS. Cheers,
Catherine

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