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is filled with the ear-piercing 'screams' of a tiny amphibian in distress, but until now, we humans have been oblivious to their cries.
When attacked, they can't exactly fight. So they scream, emitting the ultrasonic distress call by way of defense.We've known for a while that some frogs use their pipes to signal distress, warnings and alarms, and while a few studies have found frogs may be capable of emitting ultrasounds, this new study confirms it.
The cry is part of an entire sequence of defensive behaviors, in which the leaf litter frog arches its back while raising the front of its body, mouth gaping, as if in preparation to let out the blood-curdling scream that is finally emitted as the frog partially closes its maw. They think this broad range of frequencies – along with the frog's intimidating stance – is meant to deter a wide range of predators from messing with this tiny terror.
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