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Water Dragon


Water Dragon
Photo Information
Copyright: des hoi (deshoi) Silver Note Writer [C: 7 W: 2 N: 65] (322)
Genre: Animals
Medium: Color
Date Taken: 2009-09-01
Categories: Reptiles
Camera: Pentax K20 d, Tamron AF 70-300mm f/4-5.6 LD Macro
Exposure: f/7.1, 1/500 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-12-22 16:37
Viewed: 5240
Favorites: 1 [view]
Points: 8
[Note Guidelines] Photographer's Note
Identification:
Water Dragons in Australia can be up to 1 metre, with long powerful legs and claws. Their tail forms 2/3 of their length and is almost all muscle. It is laterally compressed to help act like an oar when swimming. The Water Dragon has a nuchal crest Ė a central row of enlarged spikey spines at the back of the head. These spikes continue down the spine, decreasing in size to the base of the tail. At the tail the spines divide into two rows.
The Water Dragonís upper body is a grey-green with cream and black transverse bands on the body and tail. Underneath the body is creamy brown-grey. They have loose folds of skin under the jaw, giving them an almost Bearded Dragon appearance.

Subspecies differences:
The Eastern Water Dragon (Physignathus lesueurii lesueurii) has a dark stripe from ear to eye, that the Gippsland Water Dragon (Physignathus lesueurii howittii) lacks. The Eastern Water Dragon male has a red flush on its chest and darker bands. The Gippsland Water Dragon male has an olive-grey chest, and is distinguished with a colourful throat that is blotched or striped with various colours; orange, blue and yellow.

Sexual and age differences:
Juvenile Water Dragons are light brown in colour, with head and feet disproportionately large compared with the adults. The female Water Dragons lack the bright colourations on the chest and throat, and have narrower, more delicate heads. The male Water Dragonís head is much larger and angular.

Swimming:
Water Dragons as their name suggests are semi-aquatic lizards. They spend a lot of time perching in trees along creeks and rivers. At any sign of danger they will dive into the water and either remain underwater or swim away. Water Dragons have been known to remain underwater for up to 90 minutes. Water Dragons when underwater slow their heart rate and conduct some gas exchange across their skin, both O2 and CO2.

Running:
Water Dragons at slow speeds run on all four legs, but to increase their running speed they can run on their back legs only (bipedally). Their long powerful back legs and sharp claws help in their abilities to climb trees and dig holes for hibernation and nesting.

Eating:
Water Dragons are omnivorous (eat both plant and animal matter). They generally feed on insects, frogs, yabbies, other aquatic organisms, fruits, berries and flowers. They can eat under water. There has been recorded incidents of cannibalism occurring to young hatchlings.

Mello, Taralee has marked this note useful
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Critiques [Translate]

  • Great 
  • Mello Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 140 W: 34 N: 480] (2419)
  • [2009-12-22 18:51]

Incredible and lovely pattern skin by the light angle daer Des.
Perfect technical management and lovely POV, DOF and composition.
SIMPLY PERFECT! Congrats and see you in TN.
Francisco

  • Great 
  • fthsm Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 172 W: 56 N: 512] (3689)
  • [2009-12-23 5:39]

I can't remember if I saw yellows on any of these. Looks great, TFS.

Excellent shot. I love the colours and the DOF.

Excellent composition, sharpness is good, great colours and I like the cheeky pose.

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