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.
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.