It is the sights and sounds of waterfowl overhead that perhaps best exemplify fall. Biologists have long recognized predictable seasonal migrations of birds from their breeding grounds to non-breeding grounds, or what we would generally refer to as wintering grounds. They have also come to recognize four basic routes or flyways for migratory waterfowl in North America.
Hackberry is a medium to tall tree that grows to between 40-60 feet. It ranges roughly east of a line from North Dakota south to Oklahoma. In North Dakota it has been documented in most counties in the eastern half of the state and would probably be listed as occasional.
There are three types of prairie, and in North Dakota, the tallgrass prairie historically dominated the Red River Valley. As the name implies, the tallgrass prairie was dominated by tall grasses that grow to three feet or more. Historically the tallgrass prairie has been estimated to have covered between 140-170 million acres, but I have seen estimates that only 1-4 percent remains.