Puffinosis of Manx Shearwater (Puffinus puffinus) chick, Skomer Island, date unknown.

Puffinosis is a virus disease of Manx shearwaters. Young birds get blisters on their feet, conjunctivitis and problems with movement. The death rate can reach 70% in infected birds. The infection is most common near walls and similar structures where the virus can be transmitted between feet