The Australian: Frog uses ultrasonic communication:
"The frog, Amolops tormotus, is the first non-mammalian species known to use the ultra-high frequencies that humans cannot hear."
Bats,whales ad dolphins use ultrasonic communicationand now they have found aoem frogs which can communicate ultrasonically. Kraig Adler in Cornell University in New York found frogs without external ear drums in China. Professor Feng then pursued studies with ultrasonic sounds.
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