Solving a Migration Riddle Using Isoscapes: House Martins from a Dutch Village Winter over West Africa

• Keith A. Hobson ,

  * E-mail: Keith.Hobson@ec.gc.ca

  Affiliation Environment Canada, Saskatoon, Saskatchewan, Canada

  ⨯
• Steven L. Van Wilgenburg,

  Affiliation Environment Canada, Saskatoon, Saskatchewan, Canada

  ⨯
• Theunis Piersma,

  Affiliations Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, Groningen, The Netherlands, Department of Marine Ecology, Royal Netherlands Institute for Sea Research, Den Burg, Texel, The Netherlands

  ⨯
• Leonard I. Wassenaar

  Affiliation Environment Canada, Saskatoon, Saskatchewan, Canada

  ⨯