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10 April 2014 11:44 am ,
Vol. 344 ,
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
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ScienceShot: I Spy a Cat in a Tree
3 September 2013 7:15 pm
Many mammals and birds make noisy calls when predators lurk nearby. Now, researchers have discovered that black-fronted titi monkeys (Callicebus nigrifrons) emit alarm calls that are remarkably versatile for primates, simultaneously announcing the type of predator and its location. To find out what the monkeys were conveying, scientists conducted experiments in Brazil’s Atlantic Rainforest with a stuffed raptor and cat. When the titi monkeys saw the raptor in the trees, they uttered a series of calls that mean “Raptor! Tree!” But when the monkeys discovered it on the ground, they mixed the calls: “Raptor! Ground!” Similarly, when they noticed a stuffed cat that the scientists placed on the ground, the monkeys warned: “Cat! Ground!” And when they encountered the cat in the canopy, they announced the location first, bursting out: “Tree! Cat!” Meerkats and chickadees can also announce the kind of predator and its whereabouts, but this telegraphing has never been discovered before in primates, the scientists report in the current issue of Biology Letters.