Bad news if you're eager to try out the latest — and indisputably greatest — Angry Birds game on your Windows Phone: Rovio's Peter Vesterbacka has told Bloomberg that the company has "no plans" to port Angry Birds Space to Microsoft's mobile OS. The original game in the series is currently the top-selling Windows Phone app, but Microsoft had to assist Rovio with the port and Vesterbacka cites that same difficulty of porting software as the major hurdle.

"If you look at activations, Apple’s iOS and Android are clearly bigger than any other platform. We want to be on all screens, but we have to consider the cost of supplying the smaller platforms. With Windows Phone it’s a lot of work to technically support it."

Angry Birds Space came out yesterday for the aforementioned iOS and Android mobile platforms, along with Windows and OS X on the desktop front. Being thought of as a small player in mobile isn't really where Microsoft wants to be, particularly when that attitude comes from the developers of one of the must-have mobile games. It's reasonable, therefore, to expect Microsoft to do everything within its power to convince Rovio of the value of being on Windows Phone, however, at least for now, the cosmonaut aviary adventure will be sticking to iOS and Android only.

Update: Reuters now reports a quote from Rovio CEO Mikael Hed saying that Angry Birds Space will actually have a Windows Phone 7 version, which is currently being worked on. We don't know what to make of this, as there are now two high-placed members of the Rovio team saying completely contradictory things, though if we had to take anyone on his word, the CEO is probably the one to heed.