I took a bird model from the old Dark Matter collection and put it in my game demo. I also have tried bats from that collection. Unfortunately, there is an animation issue with the flapping wings animation that causes one wing to be a bit wonky. But if the birds are flying around high in the air it isn't so noticeable. If someone were to create new flying bird models without the wing issue then you could certainly get them flying around in scripting. It's not that difficult.
System Specs: OS - Windows 7 Home Premium 64-bit SP1, CPU - AMD Phenom II X4 945, 3.0Ghz, RAM - 8Gb DDR3, GFX Card - 2048MB NVIDIA GeForce GT 640, FPSC-R Version - Beta 1.0071
