Description: Through collaboration with NOAA’s National Centers for Coastal Ocean Science (NCCOS), U.S. Geological Survey (USGS), and Bureau of Ocean Energy Management (BOEM), a marine bird importance data layer was developed for inclusion in the spatial suitability model for siting considerations in the Oregon Call Areas. Utilizing existing spatially-explicit model-predicted density data for marine birds in Pacific Outer Continental Shelf (OCS) waters (Leirness et al. 2021; data accessible at https://doi.org/10.25921/xqf2-r853), a combined spatial distribution data layer of marine bird density was created for the Pacific OCS Region. A total of 124 seasonal predicted density layers for 30 individual species and 12 taxonomic groups were selected for inclusion. Each species was assigned a vulnerability rating based on its sensitivity to offshore wind development within the Call Areas (Adams et al. 2017; Kelsey et al. 2018). Using a weighted vulnerability metric, a final combined data layer was created for use in the relative suitability model. Click here for a complete list of species/seasons included and methodologies utilized in combined layer development. Disclaimer for USGS’ role in NCCOS Offshore Wind Spatial Planning Work for BOEM: The views and conclusions in this article represent the views solely of the authors from USGS but do not represent the views of the USGS This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the USGS and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. This dataset was created using inputs from the 2021 report “Modeling At-Sea Density of Marine Birds to Support Renewable Energy Planning on the Pacific Outer Continental Shelf of the Contiguous United States", available at https://espis.boem.gov/final%20reports/BOEM_2021-014.pdf