Some frogs emit ultrasonic screams humans can't hear because they're so(00)

Some frogs emit ultrasonic screams humans can't hear because they're so(00)

Image gallery: Screaming From Bbc

Some frogs emit ultrasonic screams humans can't hear because they're so BBC: Bros After the Screaming Stops - The best bits - YouTube BBC Radio 4 - Woman's Hour - Scream therapy: Five reasons we should (or