Herbert Lang joined the taxidermy department at the America Museum in 1903, initially working on bird exhibits. He accompanied game hunter Richard Tjader on an expedition to Kenya in 1906, from which they brought 178 mammal specimens back to the museum. In 1909 he undertook the Congo Expedition with James Chapin. Here he collected the white rhinoceros, Ceratotherium simum cottoni, now on display in the Carl Akeley Hall of African Mammals, AMNH. He eventually settled in South Africa, taking a job at the Transvaal Museum, now the Ditsong National Museum of Natural History.