Hudson's masterpiece, Green Mansions (1904), is a romantic fantasy set in the Venezuelan jungle, featuring the unforgettable bird-maiden Rima. His other notable works include The Purple Land (1885), a novel of Uruguay; The Naturalist in La Plata (1892); Idle Days in Patagonia (1893); Birds and Man (1901); and A Shepherd's Life (1910), an affectionate portrait of rural Wiltshire. His autobiography, Far Away and Long Ago (1918), recalls his Argentine boyhood with remarkable vividness.
A passionate conservationist, Hudson was a founding figure of the Royal Society for the Protection of Birds. Praised by contemporaries such as Joseph Conrad, he remains admired for blending precise natural observation with poetic imagination, securing his place among the great nature writers of the English language.