Walter N. Koelz

Walter Norman Koelz (September 11, 1895 – September 24, 1989) was an American zoologist and museum collector.

Walter Koelz's parents were immigrants from the Black Forest region of Germany, and his father was a village blacksmith in Waterloo, where Walter was born. Walter Koelz studied zoology and received the degree of Doctor of Philosophy from the University of Michigan in 1920. In 1925 he joined the McMillan Expedition to the American Arctic. He also studied whitefishes during his work at the University of Michigan at the Institute for Fisheries Research. He was offered a post with the Himalayan Research Institute of the Roerich Museum in 1930. He visited Naggar in Kulu, in May 1930, to begin botanical explorations. While collecting he met Thakur Rup Chand who joined him in his efforts. Koelz would work with Chand for over thirty years.

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