1. Rudi Drent Chair in Global Flyway Ecology, Conservation Ecology Group, Groningen Inst. for Evolutionary Life Sciences (GELIFES), Univ. of Groningen CC Groningen the Netherlands
2. NIOZ Royal Netherlands Inst. for Sea Research, Dept of Coastal Systems and Utrecht Univ. Texel the Netherlands
3. School of Biology, Univ. of St Andrews Sir Harold Mitchell Building St Andrews Fife UK