1. Department of Biology, University of Rwanda, University Avenue, PO Box 117, Huye, Rwanda
2. World Agroforestry (ICRAF), University Avenue PO Box 227, Huye, Rwanda
3. BirdLife International, KG 501 St, PO Box 2527, Kigali, Rwanda
4. Department of Biology, University of Western Ontario, 1157 Richmond street, London, Ontario N6A 5B7, Canada
5. Department of Biological and Environmental Sciences, University of Gothenburg, PO Box 461, SE-405 30 Gothenburg, Sweden
6. UMR EcoFoG, INRA, CNRS, Cirad, AgroParisTech, Université des Antilles, Université de Guyane, BP 709, 97387 Kourou Cedex, France
7. Université de Lorraine, AgroParisTech, INRA, UMR Silva, 54000 Nancy, France
8. Rwanda Agriculture and Animal Resources Development, PO Box 5016, Kigali, Rwanda