William Henry Hudson was an Anglo-Argentine author, naturalist and ornithologist. His works include Green Mansions (1904).

Argentines consider him to belong to their national literature as Guillermo Enrique Hudson, the Spanish version of his name. He spent his youth studying the local flora and fauna and observing natural and human dramas on then a lawless frontier, publishing his ornithological work in Proceedings of the Royal Zoological Society, initially in an English mingled with Spanish idioms. He settled in England during 1874. He produced a series of ornithological studies, including Argentine Ornithology (1888-1899) and British Birds (1895), and later achieved fame with his books on the English countryside, including Hampshire Days (1903), Afoot in England (1909) and A Shepherd's Life (1910). People best know his nonfiction in Far Away and Long Ago (1918). His other works include: The Purple Land (That England Lost) (1885), A Crystal Age (1887), The Naturalist in La Plata (1892), A Little Boy Lost (1905), Birds in Town and Village (1919), Dead Man's Plack and an Old Thorn (1920), and A Traveller in Little Things (1921).