Northern Prairie Wildlife Research Center
Although this expedition did not enter Montana, it is included here because it is the first regional biological survey with quantitative results conducted near Montana. Merriam and Bailey spent the summer and fall of 1890 in southcentral Idaho (Blackfoot, Arco, Big Lost River, Birch Creek, Salmon River, Lemhi River, Sawtooth Mountains, Salmon Mountains, Snake River) documenting bird and mammal abundance and distribution. Merriam traveled through portions of this area in 1872 when only 16 years old on the Hayden Expedition. He compares his observations of 1890 with what he saw 18 years earlier. He also makes comparisons between their 1890 observations and Townsend's journal covering this portion of Idaho.
Merriam, Clinton Hart, V. Bailey. 1891. Biological reconnaissance of south-central Idaho. U.S. Govt. Print. Off.