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| Balen, S. (Bas) van; Nijman, Vincent; Sözer, Resit. |
| The endemic Javan hawk-eagle Spizaetus bartelsi is considered threatened with extinction because of its small population size and fragmentation of its habitat on the densely populated island of Java, Indonesia. Like many other tropical forest raptors little is known about many of its population parameters. Research was carried out from 1980 to 2000 in order to assess the status of this species. Its presence was confirmed throughout the island in both wet and dry climatic zones. Home range sizes were calculated to range between 12-36 km², and comparison with published estimates suggests that these may differ significantly between areas. Encounter rates are in the order of 0.1-0.9 birds per survey day, and were significantly higher in areas with a short dry... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Birds-of-prey; Raptor; Forest fragmentation; Java; Indonesia. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/534326 |
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| Sözer, Resit; Nijman, Vincent. |
| In the period December 1993 – January 1995 research on the behavioural ecology, distribution and conservation of the Javan Hawk-eagle Spizaetus bartelsi was carried out by R. Sözer and V. Nijman, under supervision of BirdLife International / PHPA – Indonesia Programme. This research was part of the requirements for graduation in the study of Biology at the University of Amsterdam (UVA). During the seven-month of fieldwork many new data were collected on these subjects and recommendations for the conservation of the Javan Hawk-eagle were formulated. The main research aims were: 1) a study of the home range, habitat requirements and behaviour of the Javan Hawk-eagle, and 2) a study of the distribution of the hawk-eagle with special reference to the central... |
| Tipo: Article / Letter to the editor |
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| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/506347 |
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