These classifications apply to all river waters, from small streams to medium-sized and large rivers.

This freshwater fish occupies ponds, lakes, creeks, streams, and medium-sized rivers.

Two hours or so later, after several more stretches of woodlands, we reached a medium-sized river.

It can be found in many creeks and small to medium-sized rivers throughout North America.

They prefer open waters with large and medium-sized lowland rivers and large lakes.

It can be found along small to medium-sized rivers.

With no ado he dropped us off in a pondlike opening in a medium-sized river 20 miles from the big lake.

Trawnom-Driba sprawled along the bank of a medium-sized river in a rough oval a good four miles long and half that wide.

The James River is a medium-sized river in central Alberta.

This species inhabits medium-sized rivers and may extend into headwater streams where it is often the only mussel present.