After the events of the RQ-170 last year Iran revealed that it had other US and Israeli UAVs and would reveal them during an exhibition.
The Revolutionary Guards Navy might simply be churning out a previously lost UAVs for propaganda purposes?
2011 report
Report: Iran to display Israeli, US drones
Iranian newspaper claims Tehran intercepted no less than four Israeli drones which will be showcased in upcoming exhibition
An Iranian exhibition will showcase four Israeli drones, the Tehran Times reported on Wednesday. According to the report, The exhibition will also display three American drones and will be open to local press and foreign ambassadors.
The newspaper quoted a source saying that Iran seized the Israeli jets after they invaded Iran's aerial space on its eastern border. The US drones were apparently caught when flying over eastern and southern Iran.
Last January, a senior Revolutionary Guard commander announced that his forces intercepted two spy planes in the Persian Gulf. He did not mention where the jets came from or where they were intercepted but also addressed Israel in the same statement.
The exhibition is part of Tehran's psychological warfare campaign following the interception of a US drone last week. The Islamic Republic wants to prove it can thwart any aerial infiltration attempt and prevent spying missions targeting its nuclear facilities.
Report: Iran to display Israeli, US drones - Israel News, Ynetnews
The Iraqi's also operate ScanEagles
Iraqi military to buy unmanned US drones to monitor oil fields - The Hill's DEFCON Hill
Extensively used by the US military in Iraq. Probably more than a few have been lost over the years!
ScanEagle UAV passes 3000 combat hours in Iraq