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BBC - Earth News - Bizarre mammals filmed calling using their quills
"A BBC film crew captured footage of the streaked tenrecs in the eastern rainforests of Madagascar.

By rubbing together specialised quills on their backs, the tenrecs made high pitch ultrasound calls to each other in the forest undergrowth.

The footage is the first of a mammal communicating in this way, a technique called "stridulation".

The lowland streaked tenrec (Hemicentetes semispinosus) resembles both a hedgehog and a shrew with black and yellow stripes, and is found only in Madagascar.

A film crew hoping to feature these visually striking animals in the BBC series Madagascar faced a number of challenges.

As eaters of invertebrates, particularly earthworms, the best time of year to film the tenrecs was the rainy season.

The time of day also played a considerable role."
animals  hedgehogs  science  language  communication  nature  tenrecs  quills 
february 2011 by robertogreco
Op-Ed Columnist - Learning How to Think - NYTimes.com
"The predictions of experts were, on average, only a tiny bit better than random guesses — the equivalent of a chimpanzee throwing darts at a board.
crowdsourcing  predictions  learning  culture  expertise  credentials  politics  knowledge  experts  psychology  accountability  foxes  hedgehogs 
march 2009 by robertogreco

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