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Scientists Study The Scream Of The Squirrel
SimianOverlord writes "The BBC details a recent breakthrough in Squirrel to Man understanding. Scientist James Hare, in his study of the North American Ground Squirrel, noted peculiar behaviour; they appeared to 'lose their voice' while communicating, producing only a 'breathy whisper' in sound ranges audible to the human ear. On a hunch, the intrepid boffin borrowed a 'bat detector', which translates inaudible ultrasound into the human hearing range, and discovered the Squirrels were using a whole range of distinct ultrasound messages which can give gradated threat warnings or be targetted to family members, all without any predators detecting the message, or easily pinpointing the location of the caller. Though it has been known for some time rodents use ultrasound, this is believed to be the first time that it has a proven purpose, and the content of the messages have been deciphered."
Other rodent performance evaluation.
Anyone remember the Little Fuzzy books by H. Beam Piper? The humans colonizing the planet Zarathustra think the little native bipeds can't pass the "talk and build a fire" test for intelligence until they start to listen in the ultrasonic range. . .