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.
They are some of the largest flying birds in the world. The great albatrosses have wingspans which can reach 3.7 m (12 feet). Albatrosses mostly nest on remote ocean islands and it is not uncommon for a number of species to nest together. Of the 21 species of albatrosses, 19 are listed as threatened with extinction.