FILE - In this June 13, 2010, file photo a U.S. Predator unmanned drone armed with a missile stands on the tarmac of Kandahar military airport in Afghanistan. Hunting al-Qaida targets from Pakistan to Afghanistan, Yemen to Somalia, the fleet of U.S. armed Predator and Reaper drones that killed two American members of al-Qaida in Yemen Friday, Sept. 30, 2011, are the night stalkers of the expanded U.S. war on terrorists. (AP Photo/Massoud Hossaini, Pool, File)
A remote colony of birds kept flying away before anyone could count them, so a team of ecologists built a do-it-yourself aerial drone to spy on them from above.
The team made their drone out of a 4.6-foot-wide radio-controlled airplane, two cameras and a GPS tracking unit, all for less than $2,000.
Full Story: Aerial Drone Counts Birds for Science
Tags: Science, Technology
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