Species of Greatest Conservation Need ranges at a HUC 12 resolution from the Washington Department of Fish and Wildlife's 2015 State Wildlife Action Plan (SWAP). Layer represents a weighted sum of species in each HUC as described in the Washington Habitat Connectivity Action Plan report.

We included mapped range data for 83 Species of Greatest Conservation Need (SGCN) identified in the 2015 State Wildlife Action Plan (SWAP) that had documented occurrences and associated spatial range data (REF). To ensure data accuracy, we exclusively utilized observed species ranges, defined using WDFW occurrence data collected between 1978 and 2015 and delineated based on the USGS Hydrologic Unit Code (HUC) 12 watershed classification system. A HUC 12 watershed was considered part of a species' initial range if species occurrence was recorded within it. These preliminary ranges were subsequently reviewed and refined by WDFW species experts to represent the most current and certain depiction of recently occupied habitat. Detailed methodology regarding the development of SGCN ranges can be found in Appendix B of the 2015 SWAP.

Species were ranked based on their Federal and State protection status and inclusion in the WDFW Priority Habitats and Species (PHS) list. The highest rank of 1 was assigned to species with the strongest Federal and State protection, while the lowest rank of 0.3 was given to SGCN species not listed in PHS. Although all flying birds were retained in the analysis, their final ranking score was downweighed to 0.75 due to the plan's focus on terrestrial connectivity. Similarly, a weight of 0.75 was applied to the ranking of species already represented in our focal species cores and corridors layers.

In the final SGCN layer the species ranges were added up according to their final ranking. The layer was then rescaled between 0-1 (1-representing pixels with the highest number of species with the highest ranking) and resampled to 1mi grid.

Species of Greatest Conservation Need ranges at a HUC 12 resolution from the Washington Department of Fish and Wildlife's 2015 State Wildlife Action Plan (SWAP). Layer represents a weighted sum of species in each HUC as described in the Washington Habitat Connectivity Action Plan report.

We included mapped range data for 83 Species of Greatest Conservation Need (SGCN) identified in the 2015 State Wildlife Action Plan (SWAP) that had documented occurrences and associated spatial range data (REF). To ensure data accuracy, we exclusively utilized observed species ranges, defined using WDFW occurrence data collected between 1978 and 2015 and delineated based on the USGS Hydrologic Unit Code (HUC) 12 watershed classification system. A HUC 12 watershed was considered part of a species' initial range if species occurrence was recorded within it. These preliminary ranges were subsequently reviewed and refined by WDFW species experts to represent the most current and certain depiction of recently occupied habitat. Detailed methodology regarding the development of SGCN ranges can be found in Appendix B of the 2015 SWAP.

Species were ranked based on their Federal and State protection status and inclusion in the WDFW Priority Habitats and Species (PHS) list. The highest rank of 1 was assigned to species with the strongest Federal and State protection, while the lowest rank of 0.3 was given to SGCN species not listed in PHS. Although all flying birds were retained in the analysis, their final ranking score was downweighed to 0.75 due to the plan's focus on terrestrial connectivity. Similarly, a weight of 0.75 was applied to the ranking of species already represented in our focal species cores and corridors layers.

In the final SGCN layer the species ranges were added up according to their final ranking. The layer was then rescaled between 0-1 (1-representing pixels with the highest number of species with the highest ranking) and resampled to 1mi grid.