a1 Wageningen University, Tropical Nature Conservation & Vertebrate Ecology Group, Bornsesteeg 69, 6708 PD Wageningen, the Netherlands. E-mail Bas.vanBalen@Stafton. Waunl
a2 Institute of Systematics and Population Biology, University of Amsterdam, P.O. Box 94766, 1090 GT Amsterdam, the Netherlands
The Javan Hawk-eagle Spizaetus bartelsi is endemic to the island of Java. Severe habitat fragmentation and small population size, aggravated by illegal hunting have put this rainforest species on the list of threatened bird species. Intensive searching since 1986 resulted in the discovery of a large number of localities additional to the historic ones. All known locality records of Javan Hawk-eagle have been scrutinized and are listed in the present paper. Confirmed post-1980 records are from 24 forest fragments of varying sizes: 10 (including 28 discrete localities) in west, seven (including 14 discrete localities) in central and seven (including 20 discrete localities) in east Java. The configuration of available habitat in forest clusters is evaluated. The co-existence with other threatened bird taxa, and the need for further field surveys and studies of the Javan Hawk-eagle are discussed.