[6] In the late spring and summer months they feed primarily on small mid-water organisms and insects.

[6] S. willughbii seek rocky areas where roughly acorn sized stones and larger are prevalent.

Once females enter a spawning ground,[7] they will begin to disturb or dig the gravel using their tail and making a slight indentation into a chosen spot.

[3] In Windermere, sewage plants have dumped large amounts of waste into the lake and created anoxic conditions through eutrophication.

Since 1992 phosphate stripping has been employed at wastewater treatment plants surrounding Lake Windermere to combat algal blooms.

[8] However, runoff from land continues to present problems and attempts are being made to manage the amount of phosphate that enters the lake.

[8] In Ennerdale Water, spawning grounds found in the River Liza have been subject to blockage through a man-made pipe bridge.

[9] This bridge restricted the flow of adequate size gravel to pass through the river and make it to spawning grounds close to the lake.

In recent times, efforts have been made to assist the charr population within Ennerdale Water and led to the removal of the pipe bridge and replanting of native trees surrounding the River Liza.

[9] The introduction of invasive species to waters within the lake district have provided increased competition for native charr populations.

[11] S. willughbii residing in Lake Windermere have been found to be infected with a species of zoonotic tapeworm Diphyllobothrium dendriticum[12].