The NPS Alaska Region Science Strategy states that scientific data should guide management decisions for preserving NPS core values within each park (NPS 2006). In response to the NPS need for more information on their avian resources, biologists from the Alaska Natural Heritage Program (AKNHP) and NPS conducted an inventory of breeding birds within ALAG with two principal goals: 1. Use targeted river and land surveys during the breeding season to document as many bird species as possible within the Alagnak River corridor. 2. Quantify the distribution, relative abundance, and habitat associations of bird species occurring within ALAG during the breeding season.