willatnewscientist writes "Scientists from the University of Oxford have recorded New Caledonian crows using tools in the wild for first time. The footage was captured by attaching tiny cameras to their tail feathers. The wireless cameras weigh just 14 grammes and can be worn by the crows without disturbing their natural behavior. The trick has provided the first direct evidence of the birds' using tools in the wild and may represent an important development in animal behavior studies. 'The camera also contains a simple radio transmitter that reveals the crows' location. This lets the researchers track them at a distance of few hundred metres, so that they can catch the camera's video signal with a portable receiving dish. Up to 70 minutes of footage can be broadcast by the camera's chip, and the camera is shed once the bird moults its tail feathers.'"
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