Also present at the new drone base will be the Shadow drone. Smaller and lighter than its armed brethren, the Shadow is a scout that can fly for relatively short endurances while a camera pod in its belly scans the horizon for armored vehicles or other threats. Because the Shadow is about a third the length of the Eagle and about a quarter the wingspan, having both drones in the same sky and same airbase means the Army will get to figure out one of the bigger challenges of drone aviation -- incorporating plane-sized aircraft with smaller vehicles, safely. To this end, the Army will have something of an advantage: The planes will fly in restricted airspace.
source: popsci.com By Kelsey D. Atherton