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North American river otters characteristically approach within a few feet of a boat or a person on shore due to their near-sightedness, a consequence of vision adapted for underwater sight. North American river otters have a transparent inner eyelid (called a nictitating membrane) to protect their eyes while swimming. [10] [23] [24]
The Illinois Waterway system consists of 336 miles (541 km) of navigable water from the mouth of the Calumet River at Chicago to the mouth of the Illinois River at Grafton, Illinois. Based primarily on the Illinois River , it is a system of rivers, lakes, and canals that provide a commercial shipping connection from the Great Lakes to the Gulf ...
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A great blue heron wades on the South Branch Kishwaukee River in DeKalb, Illinois, September 2006.. The Kishwaukee River, locally known as simply The Kish, is a 63.4-mile-long (102.0 km) [2] river in the U.S. state of Illinois. [3]
If you know one thing about beavers, it's probably that they build dams. (Here are a few more things: These rodents are second only to humans in their ability to manipulate the environment, and ...
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Dam and road construction, as well as stream canalization and drainage for agriculture destroy many acres of what could be habitat for this species. [3] Though Argentina began passing legislation in 1960 to outlaw the hunting of the southern river otter, hunting still does occur because of the lack of enforcement.
Lock and Dam No. 15 is a lock and dam located on the Upper Mississippi River.It spans the river between Rock Island, Illinois and Davenport, Iowa.Lock and Dam 15 is the largest roller dam in the world, its dam is 1,203 feet (366.7 m) long and consists of nine 109 feet (33.2 m) non-submersible, non-overflow roller gates and two 109 feet (33.2 m) non-submersible overflow roller gates.