The Shiretoko Peninsula is home to many species of both conifers and broadleaf trees, including the acorn-bearing Quercus mongolica (). Siberian dwarf pine trees grow above . Red foxes and sika deer also inhabit the area. There are a large number of Ussuri brown bears. The upper reaches of Mount Rausu, Mount Onnebetsu, and Mount Shari are the only known breeding areas of Arctic warblers in Hokkaidō. Sea eagles flourish here, and seals can be often seen on the coast.