Alison Johnston

Wildfowl & Wetlands Trust

University of Helsinki

Swiss Ornithological Institute

University of Illinois at Urbana-Champaign

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University of Lapland

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Swedish University of Agricultural Sciences

University of Cambridge

Swiss Ornithological Institute

Polska Akademia Nauk Muzeum i Instytut Zoologii

University of Queensland

Istituto Superiore per la Protezione e la Ricerca Ambientale

University of Helsinki

University of St Andrews

University of Helsinki

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University of Sussex

Norwegian Institute for Nature Research

University of St. Andrews

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University of Helsinki

Aarhus University