In 1906, Hantzsch conducted research in Canada on the avifauna of the northeast of the Labrador Peninsula, publishing his findings, "Contribution to Knowledge of the Avifauna of Labrador", in 1908.
In 1906, Hantzsch conducted research in Canada on the avifauna of the northeastern Labrador Peninsula, working in Killinek (Port Burwell) for several months, and then proceeding southward. He published "Contribution to Knowledge of the Avifauna of Labrador" in 1908.