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"Sheep Smarter Than They Look"
Nov. 8 Sheep, like turkeys and ostriches, are not considered the most intelligent animals, but British scientists said on Wednesday humans may have underestimated the woolly creatures.
Researchers at the Babraham Institute in Cambridge, southern England, have shown that the animals have a remarkable memory system and are extremely good at recognizing faces, which they suspect is a sure sign of intelligence.
Behavioural scientist Keith Kendrick and his colleagues trained 20 sheep to recognize and distinguish 25 pairs of sheep faces and used electrodes to measure their brain activity. The researchers said results from the study showed the sheep could remember 50 faces for up to two years.
"If they can do that with faces, the implication is that they have to have reasonable intelligence, otherwise what is the point of having a system for remembering faces and not remembering anything else," Kendrick said in an interview.
So hours of seemingly mindless grazing may not be so mindless after all. Kendrick suspects sheep got their dim-witted reputation because they live in large groups, don't appear to have much individuality and are scared of just about everything.
"Any animal, including humans, once they are scared, they don't tend to show signs of intelligent behavior," he said.
In research reported in the journal Nature, Kendrick and his team showed that sheep, like humans, have a specialist system in the brain which allows them to distinguish between many different faces that look extremely similar.
"The most important finding (of the study) is that they are able, both from a behavioral point of view and from looking at the way the brain is organized, to remember a large number of faces of individuals for a very long time," said Kendrick. "It is a very sophisticated memory system. They are showing similar abilities in many ways to humans."
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