Martín R. de la Peña, a veterinarian and ornithologist, studies the reproduction of birds, on which he has published three books, alongside a dozen others, in his native Argentina. He has also produced several films on the life of birds. Maurice Rumboll, one of Argentina's top naturalists, directs environmental education programs for students and plans interpretive trails, brochure texts, and visitor centers for his country's National Park Administration, whose Ranger Training Institute he formerly headed. Previously he directed visitors' services and research at Iguazú National Park and served as Traveling Naturalist for the Argentine Museum of Natural History.