David Costantini is Professor of Conservation Physiology at the Muséum National d'Histoire Naturelle in Paris, France. His main research interests have focussed on the physiological mechanisms mediating life-history variation and functions in animal ecology and conservation. Giacomo Dell'Omo is President of Ornis italica, a non-profit Italian association for research and education on environmental issues. His main research interests have focussed on the behaviour, ecology, and ecotoxicology of birds. He is currently involved in projects relating to many species including kestrels as favourite.
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