Analysis of Wild Rice at Houghton Lake, MI
impact on waterfowl, fisheries and water quality due to the loss of wild rice in Houghton Lake, MI.
Conservation Assessment for Olympia Marble Butterfly
(USFS) - picture and description of Olympia Marble Butterfly found in Montcalm, Newaygo, Lake, Mecosta, Osceola, Wexford and Roscommon Counties.
Ecosystem Management at Houghton Lake, MI with Emphasis on Wild Rice (zizania aquatica) ecology
study on decline of waterfowl on Houghton Lake due partially to the decline in wild rice.
Kirtland’s Warbler
(USFWS) - a fact sheet on the Kirtland's Warbler, an endangered specie, found only in 10 Lower Peninsula counties.
Section 302 Reconnaissance Report on Aquatic Plant Control for Houghton Lake and Lake St. Helen, MI
feasibility study in 1986 of providing measures for the control of aquatic growth in these two lakes.