I work on a wide range of ornithological project, although fewer than I used to, with my expertise being greatest on the birds of Southeast Asia (in particular Java) and the Caribbean (in particular the islands of Bonaire and Curacao). A lot of my fieldwork has been on eagles (to the left flight profiles of Javan hawk-eagles, produced for an identification guide published by the Japan International Cooperation Agency) and much of my recent research deals with phylogenies, the usefulness of DNA barcoding and hybridisation
Prins TG, Reuter H, Debrot AO, Wattel J, Nijman V. 2009. Checklist of the birds of Aruba, Curacao and Bonaire, South Caribbean. Ardea 97(2): i-iii, 137-268
Gomes L, Oostra V, Nijman V, Cleef A, Kappelle M. 2008. Tolerance of frugivorous birds to habitat disturbance in a tropical cloud forest. Biological Conservation 141: 860-871
Sözer R, Nijman V 2005. Effects of ENSO-induced habitat disturbances on abundance and spatial distribution of an endangered riverine bird in Borneo. Animal Conservation 8(1): 27-31
Nijman V 2003. Distribution, habitat use and conservation of the endemic Chestnut-bellied Hill-partridge (Arborophila javanica) in fragmented forests of Java, Indonesia. Emu 103 (2): 133-140.
Van Balen S, Nijman V, Prins HHT 2000. The Javan hawk-eagle: misconceptions about rareness and threat. Biological Conservation 96(3): 297-304.