Louis Island is located approximately 11 km south and 5 km east of Jackhead Harbour in the northern basin of Lake Winnipeg. Louis Island is southwest of Tamarack Island and north of Moose and Little Moose Islands. This site includes Louis Island, Main Reef Island and several small neighbouring islands. The habitats of these islands are unrecorded, but are assumed to be as noted here.
This Important Bird Area contains globally significant numbers of nesting Common Terns. In 1990, 670 Common Tern nests were found on the Louis Island Reefs. This is over 1% of this species North American population. Another 20 nests were found in 1986 on an island north of Louis Island.
Three other waterbird species also nest at the Louis Island Reefs. In 1990, there were 220 pairs of Double-crested Cormorants and 71 Herring Gull pairs nesting on the islands. Ring-billed Gulls also nest within this site.
BirdLife International (2019) Important Bird Areas factsheet: Louis Island and Associated Reefs. Downloaded from http://www.birdlife.org on 11/12/2019.