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Blow-fly


Blow-fly
Photo Information
Copyright: Foozi Saad (foozi) Gold Star Critiquer/Gold Note Writer [C: 2791 W: 0 N: 6696] (25839)
Genre: Animals
Medium: Color
Date Taken: 2008-10-31
Categories: Insects
Camera: Nikon D80, Sigma 105mm F2.8 DG macro
Exposure: f/8, 1/30 seconds
Details: Tripod: Yes
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-01-15 2:25
Viewed: 4953
Points: 34
[Note Guidelines] Photographer's Note
Blow-flies (also frequently spelled blow flies or blowflies), carrion-flies or bottle flies are members of the family Calliphoridae of flies (Diptera). Some members of this family are known as bluebottles, clusterflies or greenbottles.[2] Flies in this family are often metallic in appearance and between 10 to 12 mm in length.

The name blow-fly comes from an older English term for meat that had eggs laid on it, which was said to be fly blown.

Most species of blowflies studied thus far are anautogenous; a female requires a substantial amount of protein to develop mature eggs within her ovaries (about 800 µg per pair of ovaries in Phormia regina). The current theory is that females visit carrion both for protein and egg laying, but this remains to be proven. Blow-fly eggs,usually yellowish or white in color, are approximately 1.5 mm x 0.4 mm, and, when laid, look like rice balls. While the female blow-fly typically lays 150-200 eggs per batch, she is usually iteroparous, laying around 2,000 eggs during the course of her life. The sex ratio of blowfly eggs is usually 50:50, but one interesting exception is currently documented in the literature. Females from two species of the genus Chrysomya (C. rufifacies and C. albiceps) are either arrhenogenic (laying only male offspring) or thelygenic (laying only female offspring).

Hatching from an egg to the first larval stage takes about 8 hours to one day. Larvae have three stages of development (called instars); each stage is separated by a molting event.The instars are separable by examining the posterior spiracles, or openings to the breathing system [2]. The larvae use proteolytic enzymes in their excreta (as well as mechanical grinding by mouth hooks) to break down proteins on the livestock or corpse they are feeding on. Blowflies are poikilothermic, which is to say that the rate at which they grow and develop is highly dependent on temperature and species. Under room temperature (about 30 degrees Celsius) the black blowfly Phormia regina can go from egg to pupa in 150-266 hours (6 to 11 days). When the third stage is complete the pupa will leave the corpse and burrow into the ground, emerging as an adult 7 to 14 days later.
Calliphoridae adults are known for being shiny with metallic coloring, often with blue, green, or black bodies. Antennae are 3-segmented, aristate. The arista are plumose the entire length, and the second antennal segment is distinctly grooved. Members of Calliphoridae have vein Rs 2-branched, frontal suture present, and well developed calypters.

The characteristics and arrangement of hairs are used to tell the difference between members of this family. All blow-flies have bristles located on the meron. Having two notopleural bristles and a hindmost posthumeral bristle located lateral to pre-sutural bristle are characteristics to look for when identifying this family.

The thorax has the continuous dorsal suture across the middle, along with well defined posterior calli. The post-scutellum is absent or weakly developed. The costa is unbroken and the sub-costa is apparent on the insect.

Dis. Ac., siggi, banaei_nikon, Noisette, ferranjlloret, eng55, Alex99, jusninasirun, gracious, valy67, pierrefonds has marked this note useful
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Critiques [Translate]

Hi Foozi,

nice macro shot of this fly witgh good pov.
Beuutiful coloured picture and razor sharp.

Gert

  • Great 
  • siggi Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3097 W: 109 N: 12399] (52850)
  • [2009-01-15 4:02]

Very nice fly shot Foozi,
good natural colours, good composition and the details are good, the shadow is a nice one, well done,
Best regards Siggi

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2009-01-15 4:07]

Hi Foozi,
You made this fly so beautiful here, good composition and nice overall colors. bit bright (the leaf and background), which could have taken care of. tfs.
nagraj.v

Hi Foozi,
Impressive moment captured
Good shot. Nice macro....good contrast. Good efforts.

TFS
**MAB**

HI Foozi,
I like those flies - we call it Glanzfliege - brilliance-fly ...
And it is realy brilliant and with so many colours. Beautiful, thanks
Sabine - wishnugaruda

hello Foozi
very great colours
good sharpness
great picture
greeting lou

Hi Foozi,

Lovely macro shot. The features of the fly are so sharp and the wings seem to be shining :).

Sowmya

hello foozi
I like the wonderfull diagonal composition and the vivid colors of this shot
good focusing on his eyes
very well done
Jacqueline

Very nice fly shot an excellnt composition, sharpess and the fine details. Good job.
Best regards and TFS Ferran

  • Great 
  • eng55 Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1256 W: 42 N: 1976] (5892)
  • [2009-01-15 10:24]

Hi Foozi,
Beautiful capture of this ugly fly:)Colors,lighting,BG and POV is wonderful.
Thansk for posting.

  • Great 
  • Alex99 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4072 W: 133 N: 7096] (23735)
  • [2009-01-15 12:30]

Hi Foozi.
Nicely composed with very attractive diagonal composition close-up. Colourfulness of the image is great and BG in its smoothness is perfect too. Details of the image are very good but not ultimate. I think exposure time for this subject is long a bit. In such cases I usually use ISO 400 and more short exposure time. Tripod cannot compensate macro motion of the air, leaf and insect. My kind wishes and TFS.
Alexei.

Salam Foozi,

This bow/bottle fly looks good under the optics. The perch close to the edge of the leaf generates excellent pov with the blurry bg well placed diagonally. The 3D effect making it even more interesting.

Well done and sorry that you'll have to be working tomorrow :-)
Jusni

It's me again, Abang!
Very good macro on this Blow Flies in good closeness!
the metallic colour really looks nice in good sharpness and good details
well done
take care
Tony

  • Great 
  • valy67 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1727 W: 59 N: 3060] (9219)
  • [2009-01-16 14:48]

Hello Foozi !
Although these flies might be pestes, they are very beautiful - I love the metallic green color on this one. I also like the composition of the picture, with the border of the leaf making a diagonal. Vivid colors, excellent POV. Very well done !
Valerie.

Olá Foozi

Ótimo registro...impressionante as cores, transparência e textura. Uma imagem interessante com detalhes incríveis.
GA
Vera

  • Great 
  • uleko Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3396 W: 172 N: 3310] (10940)
  • [2009-01-18 4:49]

Hello Foozi,
A very fine macro of the Blow-fly showing off its beautiful metallic green colours. Great sharpness and a very nice composition!
TFS and cheers, Ulla

Hi Foozi,

the close-up point of view is showing the details and colors of the fly. The leave is framing well the subject. The light is enhancing the colors of the scenery. Have a nice day.

Pierre

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