How to Know the Difference Between a Reptile and an Amphibian

Ever wondered what the difference between a reptile and an amphibian is? It's not as difficult as you may think.

Difficulty: Easy

Instructions

1. Amphibians and reptiles are believed to have a common ancestor and were even grouped together for collective study by scientists several decades ago. They are now two classes, however, and for good reason.

2. Know your amphibian. The defining element of an amphibian is that their young are born and live in an aquatic environment until they reach sexual maturity. At this point they crawl onto land and spend most of the rest of their lives there. They are born with gills that eventually develop into lungs in the adult form.

3. The only exception to this rule are a few species that spend their entire lives in the water. These include some salamanders and newts, and some legless animals called rubber eels.

4. Reptiles are essentially the opposite. They are born on land, but spend their adult lives in the water. Alligators and sea snakes are excellent examples. These animals are born with lungs and retain them their entire lives.

Tips & Warnings

• If you have a question about a particular animal, particularly if you plan on keeping it as a pet, consult a veterinarian who specializes in exotic pets.
• Many species of amphibians and reptiles are extremely dangerous. Though alligators and snakes are obviously of concern, some smaller creatures like frogs and lizards utilize potent poisons or other forms of defense that can make you very ill or even kill you if not handled properly.

[grouch]

on 12/17/2007 This is very well written. I read it to my kids and they think so. Think you could write one on detecting the differences between alligators and crock?