This program aims to capture population trends in several guilds of forest songbirds as well as trends in community species diversity. Sampling occurs early to late morning (sunrise-10am) between the first week of May and the first week of July. At each sampling station an 11 minute audio-recording and a concurrent audio-visual count are obtained. A total of 18 survey transects with 5 stations 300m apart are completed in the Long Beach Unit three times every four years since 2009 and an additional two transects have been completed in the West Coast Trail Unit annually since 2011. Forest songbirds respond to numerous influences on terrestrial ecosystems and may help to provide information on biodiversity (both bird and landscape components), ecosystem function (across a variety of scales) and forest stressors (forest fragmentation, development, climate change, etc.). The measure combines 16 most common songbird species and also the species richness as a separate measurement. This is a composite measure and is similar to monitoring programs being used in other National Parks in Canada.