What the Hell Are They Flying in Afghanistan?

OK, so we now have a picture to go along with the reports of a stealthy UAV operating in Pakistan and Afghanistan.

So, you have the grainy picture, and the artist's conception.

The thing is, it doesn't make any sense to use stealth in Afghanistan.

The Taliban does not have any air defense radars operating, so why work on a specialized stealth shape?

I can see aural stealth (noise), and IR stealth, and visual stealth, but using a radar avoiding platform where there is no radar just makes no sense.

[on edit]
I just came across the BAE Corax (Raven in Greek) as a possible answer.

It's a British system, and it matches the general configuration, including the long wing, though the photo seems to show a lot more wing sweep.