Jean Théodore Delacour (26 September 1890 – 5 November 1985) was a French ornithologist and aviculturist. He later became American. 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 World War One. The second one that he established at Clères was destroyed in World War Two. 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.
Life and work
Delacour was born in Paris into an aristocratic family and grew up on the family estate at Villiers near Amiens where he was fascinated by the orchids and ornamental birds in the castle park. With the money he received from his family (his father died in 1905), he established a private zoo in Picardy. He attended schools in Paris where he spent time in the natural history museum and received a doctorate in biology from the Université Lille Nord de France. He maintained 1,345 birds of 344 species in 1916.
Delacour served in the French Army during World War I, a war which devastated the family estate, as well as killing his only surviving brother. He was so shocked by the inhumanity that he swore not to have a family and moved to England for its peace. He however decided to return to France and bought the Chateau de Clères in Normandy where he set about making a menagerie. It was so well known that the 9th International Ornithological Congress was held in 1938 in the nearby town of Rouen. One of the visitors to his aviary was Pierre Jabouille, the French administrator for Annam, a part of Indochina. On the latter's invitation, Delacour went on numerous scientific expeditions to Indochina, particularly Vietnam,