Nine acoustic bird song meters are deployed to monitor boreal bird species in mixed wood forests during the peak breeding season (24 May to 10 July). The song meters record morning (from 30 minutes before sunrise, for four hours) and evening (from 30 minutes before sunset, for one and a half hours). During each sample period (i.e. morning and evening) each song meter records every 30 minutes, for 10 minutes. Two recordings from each of the nine locations are selected randomly for interpretation and analysis, one from early (24 May to 17 June) and one from late (13 June to 10 July) in the breeding season. While selected randomly, the two recordings from each location must be a minimum of six days apart and the audio quality must be good (e.g. no wind and/or precipitation noise); otherwise, another recording is randomly selected. The data are analyzed to determine if the breeding bird communities of spruce-mixed wood forested ecosites and the functional richness and diversity of forest bird communities are being maintained over time. Species at Risk bird species are also monitored.