- Editor and principal author of the prize-winning Atlas of Wader Populations in Africa and Western Eurasia (2009).
- Author of over 130 scientific papers, reports and book chapters, and about 50 popular articles, newsletters and book reviews.
- Most publications on behalf of Wetlands International, BirdWatch Ireland and the Wildfowl and Wetlands Trust, and for bodies such as the European Commission.
- Many publications also on behalf of the international biodiversity conventions (Convention on Biological Diversity, Convention on Migratory Species, The African-Eurasian Migratory Waterbird Agreement under that Convention, and Ramsar Convention on Wetlands).
- Publications also prepared on behalf of WWF, IUCN, National Geographic, and national agencies in Belgium, Denmark, Finland, France, Germany, Ireland, Japan, The Netherlands, Norway, Sweden, Switzerland, the UK and Ukraine.