Geoffrey Francis Archer was an English ornithologist, big game hunter and colonial official. He was Commissioner and then Governor of British Somaliland between 1913 and 1922
Jean Théodore Delacour was an American ornithologist and aviculturalist of French origin. He was renowned for not only discovering but also rearing some of the rarest birds in the world. He established very successful aviaries twice in his life, stocked with birds from around the world, including those that he obtained on expeditions to Southeast Asia, Africa and South America. His first aviary in Villers-Bretonneux was destroyed in the First World War, and the second one that he established at Clères was destroyed in the Second World War. He moved to the United States of America where he worked on avian systematics and was one of the founders of the International Committee for Bird Protection (later BirdLife International). One of the birds he discovered was the imperial pheasant, later identified as a hybrid between the Vietnamese pheasant and the silver pheasant
Alfred 'Chips' Ezra was a British breeder and keeper of birds. He built up a collection of rare birds at Foxwarren Park in Southern England. He was President of the Avicultural Society and a prominent member of the Zoological Society of London, which awarded him a gold medal
Frank Finn was an English ornithologist. He went on a collecting expedition to East Africa in 1892, and became First Assistant Superintendent of the Indian Museum, Calcutta in 1894, and Deputy Superintendent from 1895 to 1903. He then returned to England, and was editor of the Avicultural Magazine 1909-10.
Friedrich Hermann Otto Finsch was a German ethnographer, naturalist and colonial explorer. He is known for a two-volume monograph on the parrots of the world which earned him a doctorate. He also wrote on the people of New Guinea and was involved in plans for German colonisation in Southeast Asia. Several species of bird (such as Oenanthe finschii, Alophoixus finschii, Psittacula finschii) are named after him as also the town of Finschhafen in Morobe Province, Papua New Guinea and a crater on the moon
Sir Hugh Steuart Gladstone of Capenoch was a Scottish ornithologist and landowner. In 1920 he became Chairman of the Wild Birds Advisory (Scotland) Committee, serving this role until death. In 1933, he was one of eleven people involved in the appeal that led to the foundation of the British Trust for Ornithology
John Gould was an English ornithologist. He published a number of monographs on birds, illustrate by plates produced by his wife, Elizabeth Gould, and several other artists including Edward Lear, Henry Constantine Richter, Joseph Wolf and William Matthew Hart. His identification of the birds now nicknamed 'Darwin's finches' played a role in the inception of Darwin's theory of evolution by natural selection. Gould's work is referenced in Charles Darwin's book On the Origin of Species
John Henry Gurney was an English banker, amateur ornithologist and Liberal Party politician of the Gurney family. Gurney published a number of articles in The Zoologist on the birds of Norfolk. He also commenced a collection of birds of prey. In 1864 he published Part I. of his Descriptive Catalogue of this collection, and in 1872 he edited The Birds of Damara Land (Damaraland, South-West Africa) from the notes of his friend Charles John Andersson. Between 1875 and 1882 he produced a series of notes in The Ibis on the first volume of the Catalogue of Birds in the British Museum, and in 1884 brought out a List of Diurnal Birds of Prey, with References and Annotations. The archives of Cambridge University Museum of Zoology contains five volumes of correspondence between Alfred Newton and Gurney, who was a founding member of the Norfolk Naturalists Trust
Karel Johan Gustav Hartlaud was a German Physician and Ornithologist. Hartlaub was born in Bremen, and studied at Bonn and Berlin before graduating in medicine at Göttingen. In 1840, he began to study and collect exotic birds, which he donated to the Bremen Natural History Museum. He described some of these species for the first time. In 1852, he set up a new journal with Jean Cabanis, the Journal für Ornithologie. He wrote with Otto Finsch, Beitrag zur Fauna Centralpolynesiens: Ornithologie der Viti-, Samoa und Tonga- Inseln. Halle, H. Schmidt. This 1867 work which has handcoloured lithographs was based on bird specimens collected by Eduard Heinrich Graeffe for Museum Godeffroy. A number of birds were named for him, including Hartlaub's Bustard, Hartlaub's Turaco, Hartlaub's Duck, and Hartlaub's Gull
William Henry Hudson (known in Argentina as Guillermo Enrique Hudson) was an Anglo-Argentine author, naturalist and ornithologist. Hudson spent his youth studying the local flora and fauna in Argentina while publishing his ornithological work in the Proceedings of the Royal Zoological Society. He produced a series of ornithological studies, including Argentine Ornithology (1888-1899) and British Birds (1895)