As of 2016, La Vallée des Singes housed 32 primate species, including black howler monkeys. The park spans 22 hectares of wooded natural habitat, allowing over 450 monkeys to roam freely without cages or barriers.

While specific details about the black howler monkeys' arrival, individual names, or participation in breeding programs at La Vallée des Singes are not readily available, the park's commitment to primate conservation is evident. Since its opening, the park has celebrated over 800 births and offers exhibitions that provide insights into animal care, new arrivals, and ongoing research efforts.