This presentation will review the amphibian diversity and biogeography in the Apostle Islands, and describe the park’s acoustic monitoring program. The Apostles support 6 species of salamanders and 7-9 species of frogs. One species (Common Mudpuppy) is restricted to Lake Superior and its river mouths. Amphibian diversity on the islands is influenced by available habitat, island size, and colonization events. Some species like Central Newt and Mink Frog are restricted to islands with lagoons. The distribution of Eastern Red-backed Salamander is particularly interesting in being absent from...