Walter Koelz studied zoology and received the degree of Doctor of Philosophy from the University of Michigan in 1920.
[1] Koelz returned to Michigan in 1932, but his interest in Tibetan culture led to his appointment as a Research Fellow on the Charles L. Freer Fund in September 1932.
In 1933 he returned to Indian Tibet to collect anthropology related material for the University of Michigan.
For seven years from 1939 he explored Persia, Nepal, and parts of India including Assam and made a large collection of birds.
Of the fish Coregonus artedi which is found in lakes and consists of isolated populations he described no less than 24 subspecies.