Climatic conditions produce contrasting influences on demographic traits in a long‐distance Arctic migrant

We thank the Irish Brent Goose Research Group and the Icelandic Ringing Group for assistance with catching birds and providing observations of marked individuals. We thank Alan Lauder and Alyn Walsh for leading cannon net catches in Ireland during the study. Sean Boyd, Josee Lefebrve, Chantelle Masson and Alyn Walsh assisted with captures of geese in Canada. SB, IRC and TB are all funded by an ERC Consolidator’s grant (310820: STATEMIG) awarded to SB. FV was funded by an Icelandic Research Council Postdoctoral fellowship grant.