It seems that the first story is full of inaccuracies if the facts in the article are accurate regarding the UAV's size and its' claim to be the "World's Biggest UAV".

The second story states "The Heron TP drones have a wingspan of 86 feet (26 meters), making them the size of Boeing 737 passenger jets and the largest unmanned aircraft in Israel's military. "

Now that statement I would buy!

The GlobalHawk has the Heron TP UAV beat in wingspan, service ceiling, and endurance according to wiki stats.
RQ-4 Global Hawk - Wikipedia, the free encyclopedia

USMCFLYR