In both strategic land-use planning assessments and finer-scale planning for landscape units or watersheds, land managers frequently ask “how much habitat is enough?” To answer this question, the Marbled Murrelet Recovery Team needed to assess the relationships between expected regional population sizes of nesting Marbled Murrelets and the area/quality of suitable nesting habitat in the coastal forests of British Columbia (BC). Marbled Murrelets are listed as “Threatened” in Canada, “red-listed” in BC, and designated as an “identified species” under the BC Forest and Range Practices Act. In collaboration with researchers at UBC, the BC Ministry of Forests, and the B.C. Marbled Murrelet Recovery Team, Cortex developed a regional demographic model for Marbled Murrelets that was used to assess policy options for regional habitat protection, helping to minimize risk of species loss in the six Marbled Murrelet Conservation Regions identified in British Columbia.