Direct human impacts: Snow petrels are sometimes caught as bycatch in commercial fishing operations, and their nesting sites can be disturbed or destroyed by human activities such as tourism and mining.
Invasive species: Introduced predators such as rats and foxes can prey on snow petrel eggs and chicks, and introduced plants can alter their nesting habitat.
Disease: Snow petrels are susceptible to a variety of diseases, including avian cholera and Newcastle disease. These diseases can be spread by contact with other birds or by contaminated food or water.