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Caution : Dragonfly Zone


Caution : Dragonfly Zone
Information sur la photo
Copyright: Haraprasan Nayak (haraprasan) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1577 W: 101 N: 5421] (20403)
Genre: Animals
Média: Couleur
Date de prise de vue: 2007-09-25
Catégories: Insects
Appareil photographique: Nikon Coolpix E5600
Exposition: f/8.1, 1/501 secondes
Details: (Fill) Flash: Yes
More Photo Info: [view]
Versions: version originale, Workshop
Date de soumission: 2007-10-06 1:43
Vue: 3225
Points: 18
[Ligne directrice - Note] Note du photographe
Dragonfly swarm ecology and behavior

By - L. Zuehls and D.A. Soluk. Program in Ecology and Evolutionary Biology, University of Illinois at Urbana-Champaign

Dragonfly swarms occur when adults exhibiting a stereotypical tight interweaving flight pattern, form a high-density aggregation within a confined area. Swarms are often composed of multiple species. Little quantitative information exists on the frequency, function, or conditions that triggers swarm formation. They recorded weather conditions, prey abundance, dragonfly behavior, and sex ratios during swarms. Weather (temperature, wind speed, and dew point) constrained swarm activity. There were two peaks of swarm activity: late morning to early afternoon, and in the evening before sunset. Swarms exhibited a skewed sex ratio, with more females participating in swarms. Foraging was the dominant behavior observed, suggesting that dragonfly swarming activity may be correlated with prey abundance. However, mating behaviors and attacks by predators were also observed. The complex nature of dragonfly swarms makes this phenomenon difficult to study, with much left to learn about the importance of swarming in dragonfly biology.

Another capture in W.S.

LordPotty, Silvio2006, lise, Silke, oscarromulus, jmirah, Argus, angybone trouve(nt) cette note utile
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Critiques [Translate]

hello haraprasan,
very interesting shot, a few days back even i have seen this and wanted to capture this but could not do it and you did it,
well done,
tfs & regards
pankaj

Thats amazing Hara!
I had no idea that dragonflies swarmed at all.
They are not so common here,and even in the season I might only see two or three in a whole year.
This is an education for me.
Thanks for posting it.
Cheers,Steve

Hello Haraprasan! Wonderful composition. Original horizon. Very good picture.

  • Great 
  • lise Gold Star Critiquer/Silver Workshop Editor [C: 169 W: 48 N: 548] (2877)
  • [2007-10-06 12:52]

Hi Haraprasan,
Incredible! Here in Canada, you have to wait for days before you even see one!
Great capture and very well done
Lise

  •      
  • jignasi Gold Star Critiquer/Gold Note Writer [C: 2118 W: 0 N: 3424] (27917)
  • [2007-10-06 14:03]

El ángulo bajo de disparo permite ver a contraluz lo que pretendías pero sacrificas colores y luz.


Saludos

  •      
  • Silke Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 729 W: 98 N: 1707] (5458)
  • [2007-10-06 15:03]

What an amazing swarm!
I love this capture that shows how plentiful they are just here!
Superb composition
TFS
silke
:D PL

Haraprasan, NAMASTAY my dear friend.
Great photography, again.
There must also be a lot of mosquitos in this area; we have seen a large amount of them this year in the Badlands in Brooks. However, my camera could not do justice to register them.
Loved your notes too.
Best regards,
Mario from COLD COLD Canada.

Hi Haraprasan,
WOW!! An incredible capture. Excellent POV and composition. Very well done.

TFS
Jim

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5077 W: 260 N: 15590] (50614)
  • [2007-10-07 6:56]

Hello Haraprasan,
This is marvellous!
I have never seen so many dragonflies in one shot (TN record?). Nor did I know that so many dragonflies together was regarded as a swarm. This is not the same as what ants and bees do when leaving the nest, as dragonflies are not social insects, but as your note suggests, it is more to do with the availabity of foof in one locality.
Nicely composed sharp and interesting image for which i thank you!
Best wishes, Ivan

Wow, that's a swarm! My husband noticed when he mowed the other day that a small swarm of dragonflies stayed with him the whole time. We can only assume he was stirring up small insects in the process of mowing and the dragonflies were taking advantage of the situation. ha ha

  • Great 
  • Mana Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1785 W: 36 N: 5588] (18578)
  • [2007-10-08 21:51]

Hi Haraprasan,
Just marking this post and will be back with a proper critique. Facing internet problem, hence doing a short job.
Regards.
Sumon

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