The 2009 - 2013 Pelican Management Plan lists Blackfoot Reservoir and Lake Walcott and the two pelican nesting sites in Idaho. Lake Cascade has a large population of pelicans in the summer. Does this include breeding pairs or are the juveniles and otherwise non-breeding individuals?
Although pelicans are wide-spread throughout Idaho, there are only two documented nesting sites recognized - both of which are in south Idaho. One is located on the Minidoka Wildlife Refuge in Lake Walcott. The other is at Blackfoot Reservoir.