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.
Although Pear Whelks, Busycotypus spiratus, are seldom found on Sunset Beach, I am posting photos at the top of this whelk webpage because I accidentally omitted them. Some have a protruding apex while others have a flat, squished-looking one as in the specimen below. Their egg cases are found on Sunset Beach. Newborn Pear Whelks differ significantly from the newborn Knobbed Whelks shown further down on this webpage. Pear Whelks, Busycotypus spiratus.