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.
Distribution in South Africa. Hoverflies can be found all over the country between the sea-shores and the mountains. In total, there are at least 180 species recorded from South Africa. The number of species declines from the northeast to the southwest. However, some species have only or predominately been found in the Western Cape.
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.