Trees in Brazil’s Amazon rainforest are being fitted with mobile phones in an attempt to tackle illegal logging and deforestation.

Devices smaller than a pack of cards are being attache d to the trees in protected areas to alert officials once they are cut down and the logs are transported. Location data is sent from sensors once the logs are within 20 miles of a mobile phone network to allow Brazil’s environment agency to stop the sale of illegal timber. The technology, called Invisible Tracck, which is being piloted by Dutch digital security company Gemalto, has a battery life of up to a year and has been designed to withstand the Amazonian climate.

It will also allow officials to track trees in real time rather than relying on slower traditional means of monitoring through satellite images.

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Ramzi Abdine, general manager of Cinterion M2M, the wireless technology arm at Gemalto Latin America, said the new device could help overcome the difficulty of tracking trees over a large area.

“The rainforest in Brazil is approximately the size of the United States so it’s impossible to monitor each and every acre,” he said.

Marcelo Hayashi, general manager of Cargo Tracck, added: “Gemalto’s Cinterion M2M was vital in enabling us to develop a tracking and tracing solution rugged enough to withstand the heat and moisture of the Amazon.

“It is unique because it’s small for inconspicuous deployment in the field and power-efficient enough to operate over long stretches of time without recharging batteries, which is crucial when tracking trees in remote areas.”