Abstract — This report constitutes an annotated list of 
197 species of birds reported from Isle Royale National Park, 
a 210-square-mile archipelago in northwestern Lake Superior 
including some 200 islets and rock outcrops. The island is 
45 miles long and 8 miles wide at its widest point. Bird dis¬ 
tribution and habitats are described, along with geography and 
vegetation; 62 species are known to have bred at least once, 
26 are thought to be breeders, and the rest are migrants. 
v 
