^^^Kongo is not Belgian Congo, even geographically they're mostly different. Kongo isn't really associated with Rubber, but who knows, it could be a mash-up
We've never had a resource associated with a single civilization either, but that's what has been pointed at here. The fact of it being an animal or otherwise is largely irrelevant, but people have named giveaway animals in a bunch of posts, namely the Bison and Seals. We have no reason to believe that we'll get anything like the animals you named, the only resource that he mentioned was the one that would be a too obvious hint to name.
The best indicator of what is to come is what has happened in the past. Here are the animals that are currently in Civ V:
Game animals: Foxes, Deer, Elephant... all found on multiple continents
Domesticated animals: Cows, Horses, Sheep, Pigs... all found on multiple continents
Aquatic animals: Fish, Whales, Crabs, Clams... found in all oceans
With that.. ANY other resource in Civ V is found on multiple continents.
Unless they do something COMPLETELY new, I'd say the best bet for a new animal would be chickens, ducks, rabbits or camels.
Can you name me an animal that would "give away" any one civilization (and not another)?
We've never had a resource associated with a single civilization either, but that's what has been pointed at here. The fact of it being an animal or otherwise is largely irrelevant, but people have named giveaway animals in a bunch of posts, namely the Bison and Seals. We have no reason to believe that we'll get anything like the animals you named, the only resource that he mentioned was the one that would be a too obvious hint to name.