I actually think its from a new transformer series not the original Beast Wars. I could be wrong but I remember seeing a trailer at the theater for an online game or something that involved some dragon transformer.
The avatar is from Beast Machines series if I remember correctly. I've had that avatar since the late 90s. Beast Machines wasn't nearly as good as the 3 seasons of Beast Wars (the ending to Beast Machines was especially terrible) but at least this avatar was something good that came out of that series! lol
The latest series "Transformers Prime" has a big dragon in it, which is from a group they call Predacons and that dragon is named Predaking, and is one of the main nemesis factors in the third season. That series is really good in my opinion, probably the best series they have done since the Beast Wars.
Thought it probably would have been I think they stopped showing beast wars shortly after they found the ark over here if its before that then I guess I missed it..... to youtube when I finish work!!
Right after they located the Ark and return to Cybertron is when the Beast Machines takes place. It ran for 2 seasons. In all it's worth checking out if you're into Transformers. I think all the episodes can be viewed in full on Youtube.