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.
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.