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How do frogs survive winter? Why don't they freeze to death?
What are some frogs that don't make noise? Where do they live? - Quora
Frog - Wikipedia
Frog's loud call lets the world know he's ready for love, Bay Naturalist
How Do Frogs Make Sound And Hear It? The Infinite Spider, 42% OFF
a Robofrog Hyla cinerea (left) and calling H. cinerea male (right). b
Lung mediated auditory contrast enhancement improves the Signal-to-noise ratio for communication in frogs - ScienceDirect
Pictures of frogs - Frogs: The largest group of amphibians
The truth about tadpoles and frogs
Behind the mask(ing): how frogs cope with noise