The Naturalist is a Colonial Age politician in Age of Empires III. Her bonuses mainly focus on building livestock by sending Cows. She is available for every European civilization, but becomes available for the Dutch and Germans at level 10 and for the Ottomans and Spanish at level 40. She provides four Cows to everyone. She is also the only female politician available in the game.
Much like The Philosopher Prince, choosing her is a good option as the Cows, once fully fattened, are a good food bonus after advancing in Age and can make up for the advance cost.