One of Friends’ fundamental goals is to help restore wildlife habitat in and along the Chicago River. Our wildlife projects target species that are at-risk due to habitat degradation and lack of available habitat. Many of our efforts have been voyages of discovery, as only a few government agencies are doing this work on any scale in Illinois. Check out some of our groundbreaking initiatives below. For general information on Chicago River ecology and wildlife, check out our wildlife web pages.
Friends' Fish Hotel: Learn the story of our first in-stream habitat project
To address a lack of high-quality habitat within the Chicago River system, Friends embarked on a two-year project with the Illinois Department of Natural Resources to create and install 400 nesting cavities for channel catfish. This sport fish is a hardy species that is present in the river in lower numbers than we would expect. As a part of the project, Friends released a total of 277,000 juvenile catfish into the river. The multi-species nesting cavities will not only benefit channel cats, but also a host of other species including bass, sunfishes, and macroinvertebrates. Check out a video about the project here.
Working with scientists from the Forest Preserves of Cook County, Friends identified bats as water-dependent species already present in the system whose reproductive success could benefit from help.
Mother bats and their young are particularly at-risk due to lack of available habitat for communal nursery colonies. To date, Friends has installed four maternity colonies to provide additional habitat for these insect-eating species. The colonies are 4’x4’x4’, large enough to support thousands of mother bats and their young. Six colonies will be installed by the end of the project in 2017.
Working with scientists from the Forest Preserves of Cook County, Friends identified ospreys as a water-dependent species already present in the system whose reproductive success could benefit from help.
Osprey populations plummeted across the country in the 1950s and 1960s due to the use of toxic pesticides. Decades after many countries banned chemicals like DDT, many osprey populations have recovered significantly. In the Chicago region, however, the osprey’s success is limited by a lack of available habitat.
In 2015, Friends installed the first osprey nesting platform of several. The osprey nest is placed on top of an 80 foot pole, providing a high vantage point and the 365 degrees of visibility necessary to appeal to nesting birds that rely on the high platform to be free from predatory animals. Ospreys rely almost 100 percent on fish for their food. Click here to see a video of the osprey nesting platform being raised.
Three additional platforms were installed in 2016, and the fifth was installed in early 2018. For more information on one of our 2016 installations, check out the Chicago Botanic Garden's post and the post from Bridgewater Studio, who constructed the nesting platform.
Working with scientists from the Forest Preserves of Cook County, Friends identified turtles as water-dependent animals already present in the system whose reproductive success could benefit from help.
A lack of available habitat means that many aquatic turtles are confined to nesting in very particular areas. These areas are often well-known to predators, leaving turtle eggs and young hatchlings particularly vulnerable.
Creating new turtle nesting habitat requires the removal of invasive, light-blocking shrubs and trees that prevent effective nesting. This particular project has ancillary river-edge benefits that Friends supports throughout the river system: increased stormwater retention and reduction in harmful invasive species. This additional habitat will help many turtle species, including painted, snapping, and Eastern spiny softshell, as they seek nesting grounds in new areas unknown to predators.
Working with a restoration company, Friends cleared 78 acres of nesting habitat in 2015-2017 and is in the process of clearing an addtional 20 acres in 2018. Friends is still engaged at these sites doing follow-up maintenance and keeping an eye on the turtles.
Chicago Riverwalk (2015-2016)
Since 2005, the Chicago Riverwalk has been an emerging cultural attraction along the downtown Chicago River. The Riverwalk expansion, extending nine additional blocks along the Main Stem, allows people to walk uninterrupted from Lake Michigan to Lake Street. This major construction project provides a unique opportunity to address the lack of habitat in the channelized Main Stem. Inspired by the success of our Fish Hotel project, Friends partnered with the City of Chicago to install fish habitat along one of the new Riverwalk blocks, called “The Jetty.”
The Jetty stretches along the south bank of the river between Wells Street and Franklin Street. A variety of underwater structures complement a series of floating gardens, to provide refuge for fish. One such structure is a series of fish “lunkers.” Lunkers are enclosed spaces that create hiding spaces for smaller fish. Other underwater habitat includes artificial substrates, which will not only provide additional hiding areas for fish, but a surface for algae and plant colonization that will ultimately attract the micro and macroinvertebrates that provide the base of the food chain for many aquatic species. This project was completed in fall 2016. Read more about the unveiling of the Riverwalk's final phase here.
In-stream Planting (2016-ongoing)
Friends’ in-stream planting project launches another partnership with the Illinois Department of Natural Resources and complements our 2014-15 installation of 400 nesting cavities and release of 277,000 channel catfish into the river. The installation of 4,500 aquatic plants in the North Shore Channel over two years will provide high-quality habitat for aquatic organisms, protect shoreline from bank erosion, create shelter for aquatic life during floods, and improve the aesthetics of the river for recreational users.
BECOME A WILDLIFE MONITOR
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Photography courtesy Dave Rigg, MWRD, and Friends of the Chicago River