Théophile Rudolphe Studer (27 November 1845 – 12 February 1922) was a Swiss ornithologist and marine biologist.
From 1871 to 1922 he was a curator of zoological collections at the museum of natural history in Berne. In 1874-76 he took part in a scientific journey aboard the German frigate- "S.M.S. Gazelle". Two years after his return he was a professor of zoology and comparative anatomy at the school of veterinary medicine in Berne.
With Victor Fatio (1838-1906), he published the first three installments of Catalogue des oiseaux de la Suisse (Catalogue of birds of Switzerland). Other writings by Studer include: