Reid, JaneArcese, PeterNietlisbach, PirminWolak, Matthew EMuff, StefanieDickel, LisaKeller, Lukas F.2021-03-022021-03-022021-02-03Reid, J, Arcese, P, Nietlisbach, P, Wolak, M E, Muff, S, Dickel, L & Keller, L F 2021, 'Immigration counter-acts local micro-evolution of a major fitness component : migration-selection balance in free-living song sparrows', Evolution Letters, vol. 5, no. 1, pp. 48-60. https://doi.org/10.1002/evl3.2142056-3744PubMedCentral: PMC7857281https://hdl.handle.net/2164/15957Acknowledgements: We thank the Tsawout and Tseycum First Nations Bands for allowing access to Mandarte, everyone who contributed to long-term data collection, NSERC (Canada), the Swiss National Science Foundation (recently P400PB-180870), the Research Council of Norway (SFF-III, project 223257) and NTNU for funding. The authors declare no conflicts of interest.13468292engSDG 10 - Reduced Inequalitiesadditive genetic variancedispersalevolutionary rescuefitnessgene flowgenetic groupsimmigration loadmigration-selection balanacequantitative geneticsQH301 BiologySupplementary DataQH301Journal article10.1002/evl3.21451