Rabbs' Fringe-limbed Treefrog projected on the side of the U.N. during #ProjectingChange event

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Ask the frog staff: How many tadpoles actually survive into adulthood?

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Hi Mark. A frog friend and I were at the lily pond today and it was rife with tadpoles of various sizes and stages. Two questions: 1) It looked like the two ducks might be feeding on them ... do they? 2) How many tadpoles actually survive to frog adulthood? — Christine C. This particular topic has come up a lot recently, and one of our visitors beautifully photographed a heron eating a rather large bullfrog out of the lily pond in the Children's Garden . It was a graphic interaction, but demonstrates how vital amphibians are in food webs and one of the reasons we use to illustrate how important it is to keep amphibians around. Almost everything eats them, or their tadpoles, or their eggs ... or all three.  Many animals eat frogs exclusively (including some frog species!), and the herons at the Garden obviously love them. I have seen ducks eating tadpoles quite rapidly. In fact, my amphibian class last summer quantified how quickly different aquatic birds could ...
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Meet the shape-shifting baby amphibians that become cannibals

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'Normal' Tadpole (left) and 'Cannibal Morph' of the Spadefoot Toad ( Scaphiopus ). The larger head morphology allows the developing larvae to go after a wider array of prey items, including Fairy Shrimp (center) ... and each other! A great summary of the larval phenomena of Phenotypic Plasticity ... one of the most dramatic forms is the Cannibal Morph , when normally omnivore/vegetarian tadpoles suddenly grow large teeth and an appetite to consume their siblings. The article contains some interview snippets from Amphibian Foundation Scientific Advisory Board member Susan Walls . Click here to read ...
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