Rudolf Grauer (20 August 1870, Hellbrunn, Salzburg – 17 December 1927, Vienna) was an Austrian explorer and zoologist.
He conducted zoological investigations in British East Africa (present-day Uganda) in 1905, German East Africa in 1907, and in the Belgian Congo (1910–11).
He died from actinomycosis, which he had contracted in Africa.
[3] His African collections are housed at the Naturhistorisches Museum in Vienna.
[4] Birds: Mammals:[2] Reptiles:[3] Amphibians:[5] Fishes:[6]