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.
We care for wildlife. Where possums live. The Common Brushtail possum makes its den in a tree hollow, under natural conditions. In urban areas, it adopts the space in house roofs for daytime shelter since there are few tree hollows remaining. The Common Ringtail possum usually builds a nest or 'drey' of twigs and leaves, in dense foliage a few metres above the ground.