9×12 colored pencil. Original available.

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White’s Tree Frog after having a few to many bugs.. but he does look so happy.

The Green Tree Frog can grow up to 10 centimeters (4 inches) in length. Its color depends on the temperature and color of the environment, ranging from brown to green; the ventral surface is white. The frog occasionally has small, white, irregularly shaped spots on its back, up to five millimeters in diameter, which increase in number with age. The frog has large discs at the end of its toes, of about five;millimeters in diameter at maturity. These help the frogs grip while climbing and allow them to climb vertically on glass. The eyes are golden and have horizontal irises, typical of the Litoria genus. The fingers are about one-third webbed, and the toes nearly three-quarters webbed. The tympanum (a skin membrane similar to an eardrum) is visible.

The Green Tree Frog is sometimes confused with the Magnificent Tree Frog (Litoria splendida), which inhabits only north-western Australia and can be distinguished by the presence of large parotoids and rostral glands on the head. The Giant Tree Frog (Litoria infrafrenata) is also sometimes confused with the Green Tree Frog. The main difference is a distinct white stripe along the edge of the lower jaw of the Giant Tree Frog, which is not present in the Green Tree Frog.

The tadpole’s appearance changes throughout its development. The length of the species’ tadpoles ranges from 8.1 millimeters (once hatched) to 44 millimeters. They are initially mottled with brown, which increases in pigmentation (to green or brown) during development. The underside begins dark and then lightens, eventually to white in adults. The eggs are brown, in a clear jelly and are 1.1–1.4 millimeters in diameter.

Although frogs have lungs, they absorb oxygen through their skin, and for this to occur efficiently, the skin must be moist. A disadvantage of moist skin is that pathogens can thrive on it, increasing the chance of infection. To counteract this, frogs secrete peptides that destroy these pathogens. The skin secretion from the Green Tree Frog contains caerins, a group of peptides with antibacterial and antiviral properties. It also contains caerulins, which have the same physiological effects as CCK-8, a digestive hormone and hunger suppressant. Several peptides from the skin secretions of the Green Tree Frog have been found to destroy HIV without harming healthy T-cells.

Australian law gives protected status to the Green Tree Frog—along with all Australian fauna—under the federal Environment Protection and Biodiversity Conservation Act 1999. Much of the Green Tree Frog’s natural habitat has been destroyed. Also, some of the frogs have been found infected with chytrid fungus (causing chytridiomycosis). These two factors associated with the general decline in frog populations in Australia threaten to reduce the population of the Green Tree Frog. However, because of the long life expectancy of this species, any effects of a reduced reproduction rate will take longer to spot than they would in a species with a shorter life expectancy (info from Wikipedia).

  • Complete 02-24-2012 in 18.43 hours spread over 12 days

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bbk01200, frog, green, nature, pencil, wildlife

I love what I do and I do what I love.. been drawing for over 60 years now – I hope I’ve got it right.

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Comments

  • Renate  Dartois
    Renate Dartoisabout 7 years ago

    very cool drawing Barbara.

  • rockinsue
    rockinsueabout 7 years ago

    love the contented expression

  • Ellen van Deelen
    Ellen van Deelenabout 7 years ago

    How beautifully done! (Thanks for your comment, its true ,i use to draw a lot, and i still have always a pencil with me)p.s. the coffee was WITH caffeine!

  • GraemesDesigns
    GraemesDesignsabout 7 years ago

    Think hes had plenty of bugs already – almost a “kiss me – I’m a proince really” expression – love it – a superb drawing and the eyes are excellent.

  • edwardfish
    edwardfishalmost 7 years ago

    Nice work..very quirky. Well done!

  • Alex Tebb
    Alex Tebbalmost 7 years ago

    Ha! This is what the fatty frog that lives in my letterbox looks like! Are you sure you didn’t come and draw him?

  • Ya never know…………

    – BarbBarcikKeith

  • Anita Inverarity
    Anita Inverarityabout 6 years ago

    LOve this- he is so satisfied looking xx

  • LBarberRiley
    LBarberRileyover 5 years ago

    He is brilliant! Such a great expression on his face!

  • Manolya  F.
    Manolya F.over 4 years ago

    so funny.. and ugly :D I love this Barbara.. I love your style

  • JaniceMachado
    JaniceMachadoabout 4 years ago

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