Dr. Pat Hart and his colleagues have published in the Journal of Field

Ornithology on the effects of helicopter noise on the singing behavior of native and none-native birds in Hawaii Volcanoes National Park. Since HAVO has the second-highest number of helicopter tours of any park in the US, this study helps by being the first to assess the impact of anthropogenic noise on songbirds in Hawai'i.

Read the full article, "Temporal changes in songbird vocalizations associated with helicopter noise in Hawai’i’s protected natural areas", in the Landscape Ecology Journal.