Aguirre-Gutiérrez, J., Kissling, W.D., Carvalheiro, L.G., WallisDeVries, M.F., Franzén, M. & Biesmeijer, J.C. (2016) Functional traits help to explain half-century long shifts in pollinator distributionsScientific Reports 6: 24451. http://www.nature.com/articles/srep24451