Cyrus Mark was a prominent early advocate of nature conservancy in the state of Illinois. Mark served as the first executive director of the Illinois chapter of The Nature Conservancy. He was instrumental in the first Nature Conservancy acquisition in the Chicago area; Volo Bog. In 1958, Mark, along with George Fell, the first president of the Nature Conservancy, negotiated the purchase of Volo Bog by The Nature Conservancy.
- Occupation
- conservationist
- Citizenship
- United States
- Born
- June 3, 1900
- Died
- February 8, 1983
