In Pursuit

Larry Trupp

Winnipeg, Canada

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The World As We See It, Or As You Missed It..28 Apr 2011

Captured on the marsh at FortWhyte Alive, on the southwest edge of Winnipeg, Manitoba, Canada. This Leopard frog was actively persuing a female, and I actually captured the mating process…BTW..Not posted here…We will just let your imagination run wild OK.

Canon XTi, Sigma 150-500mm F5-6.3 OS AV 7.1 Shutter Speed 1/400 IS0 200 focal length 439mm.

Here is a Frogs Cycle of Life:

This describes the process of change from egg to tadpole (the larval stage), through to adult amphibian. The fertilized eggs are just the first stage in a remarkable transformation called complete metamorphosis.

Many of the eggs which are laid will hatch into tiny tadpoles with dark, oval bodies and a waving tail which propels them through the water. At this stage, they do not resemble the parents in any way and only a small proportion of the tadpoles will ever reach adulthood. Many will be eaten by other creatures or die of disease.

At first the tadpoles eat the remaining egg gel from which they hatched. They then eat submerged vegetable matter whilst absorbing oxygen directly from the water using their gills (fish also use gills to extract oxygen from the water). As they grow in size, lungs will develop inside the tadpoles and they will then begin to visit the surface in order to breathe in some of their oxygen from the air.

Eventually the diet becomes more carnivorous as the tadpole will start eating small invertebrates in the water.

As their bodies continue to grow, legs will sprout out and in frogs and toads the tail will be reduced in size. From now on, the tadpoles will become more adult like as time passes. Eventually the gills will disappear and the body changes shape into that of a miniature adult. Frog and toad tadpoles will lose their tails all together. At this stage they normally leave the water.

As an active intrepreter at the Center, I lead the children in a program we call Cattails and Coots. The boys and girls get a chance to dipnet for living critters in the marsh. Many of these are often tadpoles.

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Artwork Comments

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