Radar announced late last night that Jezebel stalwart Moe Tkacik is decamping to the website as of August 18. Tkacik's departure will be a big loss for the Gawker Media run Jezebel; she's roundly considered one of the stars of the site where she covers the politics beat and pens the daily feature Crappy Hour, among other things.

No word yet on what motivated the departure, though recently Tkacik has been on the receiving end of a lot of not-so-nice attention in the aftermath of an appearance on Lizz Winstead's "Shoot the Messenger" show (backstory here). That said, Tkacik, a former WSJer, was one of Jezebel's original hires when it launched in May 2007, and fourteen months is a lifetime in the career of the blogger. Meanwhile, Radar continues to be the place where everything good Gawker seems to end up. Former Gawker writer Alex Balk took over as executive online editor last fall, Choire Sicha has been guest-writing for the Fresh Intelligence blog for the last month or so, and former Wonkette, and current Swampland scribe Ana Marie Cox signed on as a contributing editor earlier this year.