1. Department of Biological and Environmental Sciences, University of Gothenburg, SE-413 19 Göteborg, Sweden
2. Gothenburg Global Biodiversity Centre, Box 461, SE-405 30 Göteborg, Sweden
3. Universidade Federal Rural de Pernambuco, Serra Talhada, Brazil
4. Department of Marine Sciences, University of Gothenburg, SE-413 19 Göteborg, Sweden
5. Museu Paraense Emílio Goeldi, Collection of Birds, Belém, Brazil
6. Department of Biological Sciences and Museum of Natural Science, Louisiana State University, Baton Rouge, LA, USA
7. Gothenburg Botanical Garden, SE-413 19 Göteborg, Sweden
8. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA