This would probably be best suited for the clubs/armies board, I took a quick look and it looks like there have been a few dino-themed ones in the past (one specific to dinos, another about paleontology) but none are currently active and I think you could safely start a new one.
Alternatively, if you don't want to start a new club thread right now, there is also a
Prehistoria club which seems to have a focus on dinos that hasn't been seeing a whole lot of activity lately, but you could also pop in on there since it covers a lot of the same ground and there might already be other users watching that thread that would be interested in joining in on a conversation.