Ramey, A.M., Hatch, S.A., Ahlstrom, C.A., van Toor, M.L., Woksepp, H., Chandler, J.C., Reed, J.A., Reeves, A.B., Waldenström, J., Franklin, A.B., Bonnedahl, J., Gill, V.A., Mulcahy, D.M., and Douglas, D.C., 2020, Tracking data for three large-bodied gull species and hybrids (Larus spp.) (ver 2.0, March 2021): U.S. Geological Survey data release, https://doi.org/10.5066/P9FZ4OJW.