The Cerulean Warbler population has declined by over 70% since the 1970s, with loss and degradation of forest habitat identified as a primary threat. In Canada, most of the breeding population (approximately 150 breeding pairs) occurs in two areas of Ontario, the Frontenac Arch and the Carolinian Region. The Frontenac Arch supports Canada's largest population and is the only remaining area in Canada with the extensive tracts of mature deciduous forest upon which the species depends. The Carolinian Region supports a smaller but significant population in the remnant deciduous forest of southwestern Ontario. Population declines in the Carolinian Region have been especially severe, as much of the remnant forest habitat is unprotected, highly fragmented, and under immediate threat from poor forest management practices that removes mature trees and reduces forest cover. Building off previous project phases, the proposed project's objectives are: (1) no net loss of Cerulean Warbler population in 22,360 hectares within the Frontenac Arch and Carolinian Region, until 2030; and (2) increased availability of new suitable habitat for Cerulean Warbler in the Carolinian Region over the next two years. The specific project activities include working with private and public landowners to: improve habitat conservation, management, and threat reduction; monitor for target species nesting success, habitat and threats; implement Beneficial Management Practices (BMPs) for Cerulean Warbler to create new suitable habitat; and develop a BMP impact assessment tool to evaluate success of habitat improvement and creation efforts. Objectives will be achieved through working closely with several partners, including local landowners, land trusts, Conservation Authorities, counties, and the provincial and federal government.