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Slug-killing fly

Slug-killing fly
Photo Information
Copyright: Hans Hendriks (hansh) Gold Star Critiquer/Gold Note Writer [C: 277 W: 1 N: 741] (2762)
Genre: Animals
Medium: Color
Date Taken: 2009-05-31
Categories: Insects
Camera: Canon 20D, Sigma 150mm f2.8 macro
Exposure: f/4, 1/160 seconds
Photo Version: Original Version
Theme(s): Dipterans (except Hover flies) of Europe-3 [view contributor(s)]
Date Submitted: 2009-12-08 11:16
Viewed: 3079
Points: 28
[Note Guidelines] Photographer's Note
Snail Killing Fly - Tetanocera elata

This is a family of small to medium sized flies. The members of this family deposit their eggs near snails. The larvae eat the snail. This means that the members of this family are useful in biological pest control. They are bred to reduce the number of snails in farming. But they are also the living proof of how complicated matters like these can become. The flies don't distinguish between noxious snails and slugs and useful ones. So what is a blessing for one branch of agriculture is a pest for the other, namely the farmers that breed edible snails. The females do not look for snails to lay the eggs on, they simply drop them on the ground. When the weather is favorable, which means quite wet, the larvae will hunt down the snails themselves.

eng55, roges, marius-secan, boreocypriensis, loot, meyerd, maurydv, Dis. Ac., cicindela has marked this note useful
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Critiques [Translate]

  • Great 
  • eng55 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1256 W: 42 N: 1976] (5892)
  • [2009-12-08 11:18]

Hi Hans,
Beautiful close up.I liked POV,exposure,lighting,simple BG and clear details a lot.Excellent work!
Thanks for posting..

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2009-12-08 11:35]

Hallo Hans,
Wat een beest! Zijn naam is al net zo eng als hij er uit ziet. Erg mooie macro in bijzonder heldere kleuren en fantastische scherpte. Ik had er denk ik een verticale compositie van gemaakt. Er is wat veel loze ruimte links en rechts, maar de contrasterende kleuren in de achtergrond zijn prima.

  • Great 
  • zetu Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 967 W: 26 N: 3888] (16941)
  • [2009-12-08 11:36]

Hello Hans
Today no dragonfly...but a new insect capture from a perfect lateral POV. Excellent work!

  • Great 
  • roges Gold Star Critiquer/Gold Note Writer [C: 957 W: 0 N: 1329] (6264)
  • [2009-12-08 11:57]

Hi Hans,
Interessante afbeelding verstrekt. Uitzonderlijke vangen. Een soort van insect dat ik persoonlijk nog niet hebben gezien.
Een rustige avond

Hello Hans,
Wonderful macro with great details and amazing colours.
Lovely composition and perfect background.

hallo Hans
dit is een super plaatje
ik hou hier van ,daar ben je zeker al achter.
goed van scherpte en mooie kleuren
hij zit goed op het stokje
great shot
groetjes lou

Hi MF Hans,

Exceptional capture of this very strange fly which i have never seen before. Love the focus and the blurr effect on its abdomen while thorax and head are so sharp. Very original capture MF!
TFS and have a nice night!


  • Great 
  • loot Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5524 W: 722 N: 4163] (11276)
  • [2009-12-08 17:31]
  • [2]

Hi Hans

Firstly, a very educative note on a species I have never seen or heard of before.
Thanks for the introduction. Once again TrekNature has done its part to inform
us of something very interesting. Not only those members who would still come
to see this, but also all the visitors from the broader Internet community.

The image is just great. Really top notch technical material. I don't know how
you managed to get that amount of DOF from the very shallow aperture at f/4,
but all that matters is the fact that even at this close range you made it work for
this shot. It resulted in excellent and sharp details. The bumped up colour saturation
is a feast on the eyes and the isolated and evenly coloured BG did a great job to
enhance the subject.

Very well done and TFS.

PS. After a bit of research, I found that this is the second posting of this insect on
TrekNature. So, unfortunately it missed out on my theme for "RARE or SIGNIFICANT
contributions to TN
". The first posting was done by Leslie Butler (Tetanocera Elata).

Hello Hans,
great portrait of a great fly. I have not seen this species before, must be a "First" on TN! How do you get at ID of flies? They are such a big and badly illustrated group. i added this picture to a list called "Dipterans of Europe-3".
Thanks a lot for this exceptional contribution.
Best regards

Hello Hans,
very good macro shot of this insect taken with fine detail and splendid colours, excellent POV and very nice composition with a marvellous BG.
Best regards

Ciao Hans. Magnificent light and colours exaltation against the blurred BG. very good details.


Ciao Hans, wonderful bug with fantastic details, splendid colors, lovely blurry BG, fine details and excellent sharpness, very well done, ciao Silvio

Hallo Hans,

een erg goede macro met mooie egale achtergrond en veel detailering.
Prima kleuren.


Hello Hans!
Very nice capture of Snail Killing Fly. I am not specialist in Diptera but always like to learn someting about insect, so your note is very interesting in my opinion :)
All the best from Poland,

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