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Phoenicopterus in unipedal position

Phoenicopterus in unipedal position
Photo Information
Copyright: philippe hornus (amanengone) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 188 W: 54 N: 412] (2113)
Genre: Animals
Medium: Color
Date Taken: 2014-10-06
Categories: Birds
Camera: Olympus OM D EM1, Zuiko 50-200mm - 1:2.8-3.5
Exposure: f/22, 1/320 seconds
More Photo Info: [view]
Map: [view]
Photo Version: Original Version
Date Submitted: 2016-11-14 16:29
Viewed: 1554
Points: 4
[Note Guidelines] Photographer's Note
Le sujet

Phoenicopterus roseus ((Pallas, 1811)

Phyllogenetic classification

• Biota / Eucaryotes / ……… / Métazoaires / ……….. / Bilatériens / Deuterostomiens / ………….. / Chordés / ………….. / ………….. / Vertébrés / …………… / …………… / Sarcoptérigyens / …………… / …………… / Amniotes / Sauropsides / ……………. / Archosauriens / Aves / …………… / …………… / Metaves / ……………. / Phoenicopteriformes / Phoenicopteridae / Phoenicopterus

Another view of this Phoenicopterus roseus immature

Here is another view of the Phoenicopterus roseus. For more information see my previous post regarding this bird.

One interesting interrogation: why, often, flamingos are standing on one leg only? And why the head of Phoenicopterus is often placed on the same side as the supporting leg whereas the other Anatidae place it on the opposite side?

I’ve seen so many explanation:

• Thermoregulation (avoiding to loose energy with the two legs in water)
• Mechanical optimization (taking into account that the femur is horizontal)
• Better sexual attractiveness
• Making flamingo ready to struggle against potential enemy with his free leg
• At random
• Because it’s more convenient
• unihemispheric slow wave sleep (USWS) - The most likely

Did anybody have a scientific explanation? For instance, read this:

o Investigating Laterality, Social Behavior, and Temperature Effects in Captive Chilean Flamingos - Matthew J. Anderson & Croy P. Laughlin
o Passive stay mechanism allows flamingos to sleep on one leg - Young-Hui Chang, Lena Ting
o Why do birds stand on one leg? – A pilot study of exotic and native

o Unipedal postures in birds - George A. Clark, Jr.
o Why Flamingos Stand on One Leg - Andrea Thompson
o Why do birds stand on one leg? – A pilot study of exotic and native

The last explanation seems to be the most likely: "The ability to shut down 1 half of the brain is known as unihemispheric slow wave sleep (USWS; Rattenborg et al. 1999)"


• Links

o French birds’ database
o Denis Lepage – Canadian birds’ database, International Birdlife member
o Cornell University birds’ database
o Encyclopedia of life (EoL) – Phoenicopterus roseus
o Phoenicopteriformes phylogenetic classification (TolWeb)
o Phoenicopteridae phylogenetic classification (TolWeb)
o Phoenicopterus roseus phylogenetic classification (TolWeb)
o Petit guide d’identification des oiseaux
o Ornithology reserve from the Pont de Gau – Camargue
o Beaks of the birds – Adaptation
o Tre of life/a>
Paleontology and biodiversity

• Books

o Guide ornitho – Lars Svenson / Killian Mullarney et Dan Zetterström – Éditions Delachaux et Niestlé
o Les oiseaux de France – Jean-Claude Chantelat – Solar édition
o Les oiseaux de Méditerranée – Paul Sterry – Edisud/La Compagnie des Éditions de la Lesse
o La Garrigue grandeur nature – Jean-Marie Renault – Les Création du Pélican / Vilo
o Précis de Sciences Biologiques - Zoologie / Vertébrés – P.P.Grassé et Ch.Devillers – Masson et Compagnie
o Précis de Sciences Biologiques – Botanique – P.P.Grassé et autres
o Classification phylogénétique du vivant – G.Lecointre et H.Le Guyader – Tomes 1 et 2 – Belin éditeur
o L’Encyclopédie des animaux – Jenni Bruce, Kareen MacGhee, Luba Vangelova, Richard Vogt – University of California Press (Très bon guide illustré).
o Le monde du vivant – Traité de biologie – W.K.Purves, G.H.Horians, H.C.Heller. – Sciences Flammarion et Sinauer Associates Incorporated – Massachusetts.


• Date of shooting 06/10/2014 10:14:441
• Place of shooting Pont de Gau (close to « Les Saintes Maries de la Mer » - France
• Latitude 43.488660 N
• Longitude 04.404252 E

• Camera

o Objectif ZUIKO Min Focal Length 50 Max Focal Length 200 Aperture 1: 2,8 - 3,5

• Picture Specification’s

o ImageWidth 4640
o ImageLength 3472
o BitsPerSample 16
o Compression Uncompressed
o Orientation Horizontal

• Shooting condition’s

o Light source Fine weather
o Metering mode Centere Weighted Average
o Picture mode Vivid
o Exposure mode Manual exposure
o Focus mode Manual
o Focus process AF used
o Aperture f/22
o ExposureTime 1/320
o ISO Speed Rating 800
o FocalLength 200
o White Balance Temp Auto
o Noise Reduction 0
o Shading Compensation off
o Contrast 0
o Saturation High
o Sharpness Hard
o Mode image Vivid

Post treatement

Formation au post-traitement numérique

• Developpment of the raw file Olympus (*.orf) with DxO OpticsPro 11

• Light

o Compensation exposition none
o DxO smart lighting none
o Tonalité sélective none
o DxO clear view Intensité 15
o Contraste 0 – 50 – 0 / 0 – 0 – 0)
o Courbe des tons 22 / 246 – Gamma 0.90
o Vignetage Auto, basé sur module optique décelé – Intensité 100 – Préservation 50

• Colour

o White Balance Temperature 5200 °K – Teinte 0
o Colour’s Accentuation vibrance 40 saturation 0
o Colour’s rendering Referenced camera - Intensity 100 – Saturated colours protection – 20
o TSL none

• Details

o Noise reduction prime luminance 60 – chrominance 100 – Basse fréquence 75 – Pixel
Morts 25
o Netteté de l’optique Globale 0.00 – Détails 50 – Bokeh 50
o Aberration chromatique Auto – Latérales – Intensité 100 – Taille 6 – Franges violettes OK
o Masque de netteté none

• Recadrage

o Horizon 0.00°
o Recadrage Manual, without rrestriction – Ratio of resizing 1/1
o Recroping area of 2500 x 2500 px off 4608 x 3456 px


• Treatment of the .tiff file from DxO in corel paintshop pro
• Improvement of the colours and the sharpness
• Resizing to be compatible with Treknature (max 800x800 – maximum size 300K)
• Publication in .jpg file – mode compression normal - intensity 17 – mode YCbCr 1x1 1x1 1x1

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Critiques [Translate]

Hello Philippe,
Another wonderful shot of juvenile Pink Flamingos. Very good detail and nice eye contact with the bird on the right. You even managed to capture some catchlight. Exposure looks great considering the lighting you had to deal with. Beautiful color tones.
The one leg stand is obviously something we may never know for sure. I took a photo of an egret in a tree that was standing on one leg. TFS.

Hello Philippe,
Beautiful picture of these Flamingos, standing one leg. Excellent details and exact colour. I like its POV.
Thanks for sharing,
Best regards,
P.S - Thank yoy very much for your scrutiny on my picture. I appreciate your effort the way you watch picture.

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