What Exactly is an Amphibian?

amazon milk frog
Amazon Milk Frog

Before we get to that, let me throw this out there.  There are five taxonomic classes of vertebrate (having an internal skeleton) animals.  These are fish, amphibians, reptiles, birds, and mammals.  Historically, amphibians and reptiles have been grouped together, often resulting in confusion as to what each group contains.  Amphibians include frogs and toads, newts and salamanders, and caecilians.  Crocodilians, lizards, snakes, turtles, and tortoises are reptiles.

Houston Toad
Houston Toad

The words “frog” and “toad” are not strict definitions.  In general, frogs have smooth skin and are more likely to stay close to water, while toads usually have dry bumpy skin and can be found further from water.  Also, frogs jump and toads do cute little hops.  Same deal with “newt” and “salamander.”  Newts are a kind of subgroup of salamanders and are usually aquatic as adults.  The third kind of amphibian that you’ve probably never heard of is the caecilian.  These look basically like large earthworms and most are burrowers so aren’t seen very often.  Some are quite colorful and one can even grow to almost 5 feet!

Photo credit: Dante Fenolio
Caecilia species Loreto Peru. Photo credit: Dante Fenolio

So that is what amphibians are.  Stay tuned over the next few weeks of “Amphibian Month” to learn some interesting, and some downright weird things about them.



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Do you wanna build a snowman? Dont miss Snow Days this weekend from 9 a.m. to noon (or til the Texas heat melts it away). Thanks to TXU Energy this winter wonder will be here today and tomorrow!

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Happy National Zoo Keeper Week! We are proud of all the hard work, passion, and dedication seen in ALL our zoo keepers, and Sara Riger is no exception! Sara has been nominated for the American Association of Zoo Keepers #goldenkeeper award, and you can vote for her to win. Simply follow the link to the original post and LIKE her photo. Next time you're at the Houston Zoo, stop by the Naturally Wild Swap Shop to see Sara in action! ... See MoreSee Less

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Happy National Zoo Keeper Week! We are proud of all the hard work, passion, and dedication seen in ALL our zoo keepers, and Sara Riger is no exception! Sara has been nominated for the American Association of Zoo Keepers #goldenkeeper award, and you can vote for her to win. Simply follow the link to the original post and LIKE her photo. Next time youre at the Houston Zoo, stop by the Naturally Wild Swap Shop to see Sara in action!

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