Acker, PaulDaunt, FrancisWanless, S.Burthe, Sarah J.Newell, MarkHarris, M. P.Gunn, CarrieSwann, RobertPayo-Payo, AnaReid, Jane2023-06-192023-06-192023-02-01Acker, P, Daunt, F, Wanless, S, Burthe, S J, Newell, M, Harris, M P, Gunn, C, Swann, R, Payo-Payo, A & Reid, J 2023, 'Hierarchical variation in phenotypic flexibility across timescales and associated survival selection shape the dynamics of partial seasonal migration', The American Naturalist, vol. 201, no. 2, pp. 269-286. https://doi.org/10.1086/7224840003-0147ORCID: /0000-0001-5482-242X/work/125808651https://hdl.handle.net/2164/20928We thank everyone from UK Centre for Ecology & Hydrology and University of Aberdeen (UoA) who contributed to data collection, particularly Hannah Grist and Jenny Sturgeon; NatureScot for access to the Isle of May National Nature Reserve; Scottish Ornithologists' Club (SOC) for their support; and all volunteer observers, particularly Raymond Duncan and Moray Souter. This work was funded by Natural Environment Research Council (NERC; award NE/R000859/1 and award NE/R016429/1 as part of the UK-SCaPE programme delivering National Capability), Norwegian Research Council (SFF-III grant 223257), NTNU, UK Royal Society, Marine Alliance for Science and Technology for Scotland (MASTS), SOC and UoA.181956218engdisruptive selectionmultistate capture-recapturepartial migrationphenotypic plasticitytemporally varying selectionthreshold traitQH301 BiologyNatural Environment Research Council (NERC)NE/R000859/1NE/R016429/1Supplementary DataQH301Journal article10.1086/7224842012