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Learn More
In Learn More the National Geographic magazine team shares some its best sources and other information to expand your knowledge of our featured subjects. Special thanks to the Research Division.

Related Links

Warkentin Lab
Watch video footage of red-eyed tree frog embryos hatching after snake attacks.

Smithsonian Tropical Research Institute
Learn about research on tropical biodiversity being conducted at this institute based in Panama.

Bibliography

Hoofrichter, Robert, ed.Amphibians: The World of Frogs, Toads, Salamanders and Newts. Firefly Books, 2000.

Warkentin, Karen. "Adaptive plasticity in hatching age: A response to predation risk trade-offs." Proceedings of the National Academy of Sciences (April 1995), 3507-10.

NGS Resources

Reeder, Tracey. Poison Dart Frogs. National Geographic Books, 2005.

Hogan, Dan, and Michele Hogan. "Freaky Frogs." National Geographic Explorer (March/April 2004), 10-15.

Sunquist, Fiona. "The Weird World of Frogs." National Geographic World (March 2002), 14-19.

"The Fragile World of Frogs." National Geographic (May 2001), 106-23.

Wilsdon, Christina. "Tree Frogs." National Geographic World (October 1994), 23-27.