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Flights of bar-headed geese


Flights of bar-headed geese
Photo Information
Copyright: samiran nandy (samiran88) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 834 W: 85 N: 1657] (10271)
Genre: Animals
Medium: Color
Date Taken: 2013-12-11
Categories: Birds
Camera: Nikon D90, Sigma 150-500mm F5-6.3 APO DG OS HSM, Digital RAW
Exposure: f/10.0, 1/800 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2014-01-05 16:45
Viewed: 3486
Points: 34
[Note Guidelines] Photographer's Note
This is the time in India when we can observed so many migratory birds. on 12 December morning I was visited a lake near Santiniketan, for searching migratory birds ( our winter visitor). I found many migratory birds over there, Bar-headed Goose (Anser indicus) is one of them. , This is another shot of behavioral study of Bar-headed gees.
large image


This is an amazing bird. Enormous stamina......... ....


The trans-Himalayan flights of bar-headed geese (Anser indicus)
A significant proportion of the world's bar-headed geese (Anser indicus) make biannual migrations between breeding areas in Mongolia, northern China and the Tibetan Plateau (latitude between 29°N and 37°N, mean elevation of 4800 m) and wintering areas in India, crossing the Himalayan mountains (along the southern edge of the Tibetan plateau) en route. This species has become renowned for a paradigm of extreme high-altitude migration, being frequently cited as flying regularly above 8000 m following the original report of observation of birds over the summits of the Himalayas. Birds that fly over mountain barriers must be capable of meeting the increased energetic cost of climbing in low-density air, even though less oxygen may be available to support their metabolism. This challenge is magnified by the reduction in maximum sustained climbing rates in large birds. Bar-headed geese (Anser indicus) make one of the highest and most iconic transmountain migrations in the world. We show that those populations of geese that winter at sea level in India are capable of passing over the Himalayas in 1 d, typically climbing between 4,000 and 6,000 m in 7–8 h. Surprisingly, these birds do not rely on the assistance of upslope tailwinds that usually occur during the day and can support minimum climb rates of 0.8–2.2 km•h−1, even in the relative stillness of the night. They appear to strategically avoid higher speed winds during the afternoon, thus maximizing safety and control during flight. It would seem, therefore, that bar-headed geese are capable of sustained climbing flight over the passes of the Himalaya under their own aerobic power.


Information source: Royal Society's Biological News.

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kinglove, ramthakur, Hotelcalifornia, Hussain58, marius-secan, Miss_Piggy, Chiza, CeltickRanger, Hormon_Manyer has marked this note useful
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Critiques [Translate]

SIR
照的清晰 很漂亮的雁子
非起來的雁子有這黑白的翅膀立體美
在水里的雁子也很可愛
非常多樣化的題材
光線亮麗 水波深藍的就像化不開的稠密
構圖美麗 背景深遂
謝謝分享
STONE

nice flock, TFS Ori

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2014-01-05 23:37]

Hi,
Beautifully captured image...good panoramic view of the flight, lovely lighting...its the birds and water...good contrast. well captured. tfs.
nagraj.v

Fabulous image of a flock of Bar-headed Geese, especially in LP, Mr Nandy. The canvas is so large it accommodates the birds both in flight and on water. The image has been taken in perfect light conditions.
Thanks for sharing this grand creation from you.
Ram

Hello Samiran Da,
Very beautiful picture.Nice colour and sharpness.Like its POV too.
Thanks for sharing,
Regards and have a nice time,
Srikumar

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2014-01-06 2:27]

Hello Samiran,
The LP version of this photo is a very good choice. Very impressive. Splendid colours and a great composition in excellent sharpness.
Regards,
Peter

Hello Samiran bhai,

Hope you are well. I am glad you liked my black kite photo.This shot of yours is really a splendid one and the large image being large was really very impressive. It was a truly panoramic view of the these elegant fliers in the skies. These geese are very graceful in every way. The depth of field, focus, details, the entire scene is breathtaking. What an opportunity to be near a lake and what a blessing that you have a fine camera. Thanks a lot for sharing these power packed lovely shots, take care.

Warm regards/Abid

hallo Samiran
very nice panorama picture with great sharpness and good details
thanks greeting lou

Amazing scene Samiran! Great photo too! Excellent composition and wonderful colours!
Regards,
Christodoulos

Hello Samiran,
Absolutely amazing capture with splendid natural colors and excellent details. The light is great. Incredible sharp details. The large version is terrific.....
Thanks for sharing!
Marius.

Ciao Samiran, great capture of lovely geese, nice scene, fine details, splendid light and wonderful colors, very well done my friend, ciao Silvio

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2014-01-07 11:52]

Hi Samiran,very nice large view with great details despite the distance and the small space available there for the upload,great timing too to take so well this beautiful moment,i like it! Have a nice day and thanks,LUCIANO

Hallo Samiran
What a splendid image that is filled with such a lot of details and beautiful colours. It is really a pleasant scene and has a calmness that surrounds it when you look at it. Thanks for sharing. Best regards.
Anna

Hello Samiran Da,
Excellent catch and presentation of LP version,Great details and clarity.
regards,
Joy

  • Great 
  • Chiza Gold Star Critiquer/Gold Note Writer [C: 133 W: 0 N: 474] (5351)
  • [2014-01-11 7:50]

Hola Samiran, que belleza de foto, excelente entorno natural, color, luz, foco y composición, además de una especie fabulosa...saludos.

Hello Samiran

WOW ! I have missed this lovely scenery from you, with very
fine POV, great DOF, best framing with the panorama.
lovely light, great focus, sharpness and details of all the group, TFS

Asbed

Hi Samiran,
The cropping, I mean the panoramic format was a fantastic idea which made the composition extremely powerful and pleasant. Extraordinary image, the technical parameters are brilliant, and the overall result is tremendous. Bravo!
Best regards, László

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