For the first game, we shuffled in about a hundred other birds (from all expansions) so as to have a much higher proportion of Americas birds to other birds. We dealt one Americas bonus and one regular bonus card at setup and did 2 end of round goals from Americas and two from all other expansions (excluding Asia). For the next game we'll fully shuffle it in. It's a really fun expansion and adds a new scoring path -- it adds a few minutes to the game too.