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The American Bullfrog (Rana catesbeiana)


The American Bullfrog (Rana catesbeiana)
Photo Information
Copyright: Mircea Costina (mirceax) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 235 W: 57 N: 1323] (5915)
Genre: Animals
Medium: Color
Date Taken: 2008-07-15
Categories: Amphibians
Camera: Canon EOS 40D
Exposure: f/6.3, 1/640 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2008-07-19 13:26
Viewed: 459
Favorites: 1 [view]
Points: 30
[Note Guidelines] Photographer's Note
The American Bullfrog (Rana catesbeiana) is an aquatic frog, a member of the family Ranidae, or "true frogs", native to much of North America.
The bullfrog is a large species in the family Ranidae; it can grow to a length of 20 cm (7.87 inches) with a weight of up to 750 g (1.65 pound), the largest frog in North America.Females are typically larger than males. They are generally varying shades of green or brown, with dark brown, dark green, or black blotching and a yellow or white underside.
The American Bullfrog uses its skin, buccal cavity, and lungs for respiration. Cutaneous ("skin") gas exchange is very important in all amphibians. They are aptly named since their call is a loud, guttural bellow that carries a long distance, giving the impression that the frog is much larger than it actually is, which is an advantage in keeping predators away.
The male reproductive organs are the testes and their duct, and the female have ovaries. In the spring the male calls the female from the water. The female lays up to 20,000 eggs, and these eggs become tadpoles. Their metamorphosis brings them the organs that are only found in the adult frogs and takes between 12-24 months.



The skeleton of an adult frog consists of bone, hyaline cartilage, and calcified cartilage. The calcified cartilage can be found throughout the body of the frog, but it is particularly more noticeable in the epiphyses of the long bones in the limbs and shoulder-gridle. The frog has no scapula and a suprascapula which allows for greater range of motion for long jumps.

http://en.wikipedia.org
Luis52, siggi, claudine, Juyona, CeltickRanger, jconceicao, gerbilratz, Pentaxfriend, mala-zaba, mlines has marked this note useful
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Critiques [Translate]

  • Great 
  • Luis52 Gold Star Critiquer/Gold Note Writer [C: 1026 W: 5 N: 2888] (10447)
  • [2008-07-19 14:02]

Hola Mircea.
Muy bella la foto de esta Ranita. Exelente nitidez y muy agradable la iluminacion en la imagen.
Luis52.

Bonsoir Mircea,
C'est un superbe portrait! A "prize winner" comme certains diraient. Bravo pour la composition, les couleurs et l'exposition!
Claudine

  • Great 
  • Juyona Gold Star Critiquer/Gold Note Writer [C: 2108 W: 6 N: 2116] (13589)
  • [2008-07-19 16:16]

Hola Mircea,
preciosa macro,
detalles y buen foco...
buenos colores.
saludos

bonjour Mircea

je vois que tu ai allé à l'ile Bizard,

la reflection est réussie et superbe dans cette image-là,
avec un excellent eye-contact avec toi, des deux côté
hors de l'eau et de l'eau de la reflection, TFS

Asbed

Hi Mircea,

Great capture.Lighting,sharpness and composition are good.

Mircea,
This photo is excellent. I love the detail in the eye and the reflection on the water. Great focus and composition. TFS.
-Matt

Bullfrog and leech.....great looking frog. Nice, clean and sharp colours, you have done well to get this so well composed and with excellent clarity. regards h

  • Great 
  • siggi Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 477 W: 11 N: 1348] (4706)
  • [2008-07-20 0:58]

Hi Mircea,
very nice shot
I like the colours
focus is really good
the fly on it looks very nice!
well done
Siggi

Hi,
great shot, I like the eyes of the frog
compliments
Ryszard

Amazing pic, great colors and POV.

TFS
Jay

Hi Mircea,

Superb shot
Excellent compo with a perfect reflection and lovely colors

TFS Thijs

Salut Mircea,
Très belle composition et réflexion du sujet dans cette eau calme. L'utilisation du flash est bien fait.
TFS
Eric

excellent shot, very clear without a sign of noise, great light and colours.
Tfs
Ilias

  • Great 
  • cako Gold Star Critiquer/Gold Note Writer [C: 471 W: 0 N: 511] (2465)
  • [2008-07-22 5:38]

Hi Marcea
great sharp and detail
very nice colors and composition
very well done.

  • Great 
  • mlines Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 509 W: 17 N: 555] (2560)
  • [2008-08-31 20:43]

Hi Mircea. This is a perfect example of good photography. Such detail is visible. Frogs make some ideal subjects for TrekNature. The reflection is highly benefitial to the dramatic capture. TFS. Murray.

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