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Assassin


Assassin
Photo Information
Copyright: Grzegorz Wieczorek (red45) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2636 W: 74 N: 9091] (31094)
Genre: Animals
Medium: Color
Date Taken: 2007-08-12
Categories: Insects
Camera: Canon Powershot S2-IS, Raynox DCR-250
Exposure: f/8, 1/400 seconds
Photo Version: Original Version
Theme(s): Robber flies (Diptera: Asilidae) of Europe, Dipterans (except Hover flies) of Europe-1 [view contributor(s)]
Date Submitted: 2007-08-13 23:24
Viewed: 3401
Points: 42
[Note Guidelines] Photographer's Note
Hello my friends!

Something is wrong with my cam or with me maybe - I don't like most pictures which I take :-) This one is rare exception.

Some info about prey of Robber flies from this excellent page: http://www.geller-grimm.de/general.htm

WOOD (1981): "Species of some genera show a preference for one type of prey; for example species of Mallophorina attack Hymenoptera almost exclusively (Linsley 1960). Others, however, are more opportunistic, capturing whatever insects are available. In an extensive study of the ethology of 10 species of asilids, Dennis & Lavigne (1975) found that five were stenophagic, exhibiting a strong preference for prey of one or two orders, and five were euryphagic, taking prey from a broader range of orders. However, even some stenophagic species were observed to be opportunistic, switching their prey to another order when some particular insect was especially abundant. Scarbrough (1978) found that although 67% of all prey of the stenophagic Cerotainia albipilosa Curran belonged to Diptera and Hemiptera-Homoptera, these orders were also the most abundant at the study site."

The size of prey taken varies widely with each species of predator. Dennis & Lavigne (1975) found that the mean size ratio of predator to prey was 2.6:1, varying between 1.8:1 for larger predators and 3.7:1 for smaller predators. The smaller asilid species had larger predator to prey ratios, presumably because they were weaker and would not be able to subdue larger prey. An asilid may fly out after a prey that is much too large but he avoids it just before capture, or grasps it for a few seconds then releases it again (Scarbrough 1978). Females of some species take larger prey than do males of the same species, but no sex differences have been noted for other species. Females also spend more time seeking prey than do males, possibly because of their reproductive requirements."

Alex99, thiv56, fartash, haraprasan, marhowie, LordPotty, uleko, ellis49, SelenE, Proframe, gannu, Silke, extramundi has marked this note useful
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Critiques [Translate]

  • Great 
  • batu Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1079 W: 293 N: 4497] (16383)
  • [2007-08-13 23:31]

Hello Grzegorz,
a really sharp and detail-rich picture of the robberfly. Details of the face and of the legs are exceptionally clear.
Best wishes, Peter

  • Great 
  • Alex99 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4072 W: 133 N: 7096] (23735)
  • [2007-08-14 0:31]

Hi Grzegorz.
Your shot is brilliant as previous. Clearness and richness of colours and razor sharpness and perfect details impress the imagination. Pictured scene is amazing and very nice. POV is superb as well as the DOF. Green BG (surroundings) is pleasant and fine. Bravo and TFS.
Alexei.

Hello Gregorz!

An excellent, sharp, clear, professional shot of this insect! TFS.

Hello Grzegorz
Very intersting shot of this Robberfly,
Perfect details,DOF and composition,
Superb shot,Welldone.

Good Luck
Fartash

great super macro nice colours and details

Stunning shot with your equipment, Greg. Absolutely crisp and sharp details and colours on the entire subject.
Thanks for looking at my Bulbul picture; it feels good to hear a word from you.
Warm regards.

  • Great 
  • nimou Gold Star Critiquer/Gold Note Writer [C: 148 W: 1 N: 687] (3171)
  • [2007-08-14 3:57]

superbe definicition. Congrats

Good Morning Greg,
Wow - excellent macro of this robber, these are one of my favorite insects..
I think this is just perfect, a wonderful closeup composition with prey.
Very well done mf.
Howard

Hola Grzegorz,
Excelente toma de gran nitidez y detalles de un momento muy oportuno, la luz y fonodo son excelentes, saludos
José Ramón

Nothing wrong with this shot Greg.
Stunning sharpness on this impressive robber fly.
Great DOF and composition too.

Chris

Hi Greg,
I know the feeling ... I've hardly taken a shot yet with my Powershot s3 IS that I'm really happy with. I haven't used it for weeks and keep wanting to go back to my Panasonic.
This shot is really good though ... absolutely 110% perfect though.
Is the Raynox DCR-250 a macro lens ?
I want one.
Steve

  • Great 
  • uleko Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3396 W: 172 N: 3310] (10940)
  • [2007-08-14 7:11]

Hello Grzegorz,
I must say that I'm not very fond of these insects but your capture is most impressive!
The details are all in focus and sharp and colours very good too. I like the soft background and the composition is excellent.
TFS and cheers, Ulla

nieprawdopodobna ostrosc, szczerze gratuluje, piekne zdjecie
pozdrawiam
marcin

Hi Greg,
agree with you, I don't like your picture either;-)
Serious, you know I like all of the very much, my friend and
this one is no exception.
Well composed with a good POV and very fine details.
The DOF is great too, the insect standout well from the BG.
Very well done.

hello
great sharpness, excellent shot, well composed too
regards
jo

  • Great 
  • SelenE Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2249 W: 65 N: 4205] (13972)
  • [2007-08-14 13:18]

Hi Greg,
This is the second great macro I've seen tonight in TN. Focus, sharpness and clarity are very good. Composition, POV, colors are very nice too. Very well done and TFS
TFS
Best wishes,
Selen

Hello Grzegorz,
Hopefully your cam and you will be one soon again, because I don't want to miss awsome images like this one.
Superb macro shot you are showing us here again.
Technically flawless with perfect composition, sharpness, lighting and clarity.
Details are awsome and I like the way you did frame the image very much.
Thanks for sharing and the great note.
Best wishes and good night.
Harry

Hi Red,
A beautiful capture of this robberfly. Very nice details (Excellent closeup) and the composition is also very good thanks a lot for sharing.

Hi Greg,
That is what I call a photo with a lot of detail. You made the ugly look wonderful. Superb work on the lighting and exposure. The clean and shadeless composition are perfect. If I really need to find something than it would be the DOF, a tad more would be better. But now I am really nit picking.
TFS,
Niek

  • Great 
  • gannu Gold Star Critiquer/Gold Note Writer [C: 988 W: 4 N: 3277] (14761)
  • [2007-08-15 8:59]

Very nice shot and excellent focus. Beauty shot. Well done and TFS Ganesh

  • Great 
  • Silke Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 729 W: 98 N: 1707] (5458)
  • [2007-08-16 6:33]

Stunning details and excellent composition. this is not the prettiest insect, but it sure is amazing!
TFS
silke
:D

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