Abstract
ABSTRACT The Javan Hawk-eagle Spizaetus bartelsi is globally endangered species which exclusively occupies the last remnant forests of Java island, Indonesia. Studies to explore its distribution throughout the island and to uncover its eco-biology have been going on. Recent field surveys recorded new localities of the Javan Hawk-eagle at South Cianjur, West Java, at G. Sanggabuana, Karawang district, West Java and at G. Endut complex, West Java. Our understanding about this enigmatic bird of prey has been improved. Ecological research, including radio tracking, has provided information on prey species, breeding biology and the estimated home range. Small mammals such as treeshrews, squirrels, bats, rats and other small rodents are the preferred prey, but birds, snakes and lizards are also taken. The Javan Hawk-eagle may breed at anytime of the year but usually between January and July. It is sexually mature at the age of three to four years, breeds every two years and lays only one egg. Incubation lasts f...
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