The state's most important rivers are the Missouri, rising in southwest Montana and flowing north and then east across the state, and the Yellowstone, which crosses southeastern Montana to join the Missouri in North Dakota near the Montana border.
Habitats. Hoverflies can be found in every biotope but not in deserts. Each species tends to prefer a certain type of habitat and is limited to a distinct range within the country. There are relatively few species with broad habitat tolerances that enable them to be distributed throughout southern Africa.
The possum is not to be confused with the opossum, which is found in North America and is the only marsupial which inhabits areas outside of Australia and it's surrounding islands. Possums tend to be found inhabiting bush-lands and rainforests where the possums live in hollow trees and logs.