To protect an important breeding and nesting site for many species of waterfowl.
It is forbidden to walk along the walls of the Rocher Percé due to the danger of falling rocks.
Why (environmental context for protection)
The Rocher Percé acts as a summer home for many species of birds, including double-crested cormorants, great cormorants, black-legged kittiwakes, and herring gulls. It also houses a colony of over 100,000 gannets, which visit the rock to breed. In total, the area is a refuge for over 200,000 birds from at least 11 different species.