Bigger isn't always better, even when it comes to battlefield weaponry.

To protect troops fighting in Afghanistan, the British Army is using mini-drones, each the size of a sparrow, to peer around corners and look for threats, according to the Los Angeles Times.

The remote-controlled Black Hornet drones, which look like toy helicopters and measure 4 inches (10 centimeters) in length, come equipped with a camera that provides still images and video to a computer terminal, the Associated Press reports.

The pocket-sized drones can fly in windy conditions, have a range of roughly half a mile (800 meters) and can operate for 30 minutes on a fully charged battery, according to Geek.com.

"We used it to look for insurgent firing points and check out exposed areas of the ground before crossing, which is a real asset," Sgt. Christopher Petherbridge of Britain's Brigade Reconnaissance Force told the Associated Press. Petherbridge called the Black Hornet simple to operate and said the mini-drone offered "amazing capability to the guys on the ground."

Norwegian engineering firm Prox Dynamics AS designed the Black Hornet mini-drones, which can fly as fast as 22 miles per hour (35 kilometers per hour). But technology this sophisticated doesn't come cheaply: A contract for 160 of the drones cost $31 million (20 million pounds), according to Geek.com.

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