Hill moved to Australia in 1892. In Australia he formed with a group dubbed "The Fraternity of Duckmaloi" that did studies on the platypus and was named for a noted "hunting ground" for the animal. He is also noted for studies of marsupials. He returned to Britain and UCL in 1906 as the Jodrell Chair of Zoology and curator of what is now the Grant [Museum of Zoology and Comparative Anatomy|Grant Museum of Zoology]. In 1921 was made the first Chair of Embryology and Histology at UCL.