Can you name the world's fastest mammal? How about the biggest shark? If you said the cheetah, and the whale shark, you’re right! It's safe to say that we will probably never discover faster, or bigger, animals. However, it is still possible to find small animals that can set new records for being tiny.
Take frogs, for example. For many years, two kinds of frogs were tied for the honor of being the world's smallest. One species lives in Cuba, the other in Brazil. These frogs are so small that one can perch its whole body on a United States dime. Look at a dime and imagine an adult frog sitting there!
Recently, those two little species from Cuba and Brazil lost their title as Earth's smallest frogs, thanks to two scientists from the United States. They were herpetologists (scientists who study amphibians, including salamanders and frogs). In 2009 these scientists were studying frog calls on Papua New Guinea a large island nation north of Australia, in the Pacific Ocean.
The scientists were recording frog calls at night. All around, they heard chirping sounds that came from dead leaves on the forest floor. "Probably insects," they thought, but they decided to check. They searched among the leaves but found nothing. Frustrated, they grabbed whole handfuls of leaves and stuffed them into a clear plastic bag. Then they slowly searched through the bag, leaf by leaf. A small frog hopped off one of the leaves!
When I say "small frog," I mean one that can sit on a dime with room to spare. It was just 7.7 millimeters long. That's less than a third of an inch. Though the scientists later discovered another slightly bigger relative, the first one is now officially Earth's smallest frog—and Earth's smallest four-footed animal.
These tiny frogs are hard to catch. They can leap 30 times their own length. But the herpetologists managed to catch quite a few, take photos of them, and learn about their lives, close up. It wasn't until January 2012 that the scientists announced their discovery. Since this frog was discovered near a village called Amau, it was given the scientific name of Amauensis. Eventually, people may come to call it the Amau frog.
In the world of science, the tiny Amau frogs are very big news.
At the end of his book FROGS!, Larry Pringle has an Author’s Note called “A Life Full of Frogs” in which he tells about his close encounters with frogs as a child, as a father, as a wildlife photographer, and as a neighborhood ecologist acting locally to protect and even create anuran habitats. His relationship with frogs continues to this day. He says, "Our Spring evenings are sweetened by a chorus of spring peepers from the neighborhood wetland forest. Also, almost every day we visit our backyard garden pond. Several green frogs, large and small, live there. There are tadpoles of both green frogs and gray tree frogs." For more on the story behind the book, click here.
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