Javan Hawk-Eagle Conservation: From National Symbol to Forest Protection

Indonesia’s Javan hawk-eagle has become a source of national pride and a focus of conservation work. Its designation as a national bird in 1993 helped make the species more visible, but it also gave people new reasons to possess it. The result is a complicated legacy: far more research and public engagement, alongside continued capture for trade and loss of the forests it needs.

A national symbol with a conservation cost

President Soeharto named the Javan hawk-eagle (Nisaetus bartelsi) Indonesia’s national bird in January 1993. At the time, the species was little known. Its prominent crest recalled the mythical Garuda, featured on Indonesia’s national emblem, and the bird was found only in Indonesia. Its rarity also made it a candidate for public attention: rainforest loss on densely populated Java had left the eagle with a small, scattered range.

Ornithologist Bas van Balen recalls that a 1993 workshop selected three national animal symbols: a popular animal, a charming one and a rare one. Representatives from scientific, educational, media and conservation organizations took part. The committee considered the risk that the eagle might attract the kind of demand experienced by the black-naped oriole, a regional symbol that became sought after by bird traders. Its members believed the authorities would be responsible for protecting the eagle.

That confidence ran ahead of the safeguards. Birds of prey had been legally protected in Indonesia since 1970, but declaring this particular eagle a national symbol did not prevent it from being captured or kept. After the designation, anyone seeking to keep one needed permission from the president. Soeharto’s wife, Ibu Tien, was the only person granted it. Her juvenile eagle, almost certainly taken from a nest, was displayed at a Jakarta zoo managed by a foundation belonging to the Soeharto family.

Zoos wanted the birds, too, including for possible breeding. Anonymous “gifts” offered a way around restrictions. Two years after the designation, three zoos on Java had displayed, or had previously displayed, 14 Javan hawk-eagles. Six died within a year. The high losses reflected the difficulty of keeping a rainforest raptor in captivity.

Ownership carried social meaning as well. Keeping a legally protected animal could signal status and a sense of immunity from consequences. A national celebrity, for instance, posed in traditional dress beside a pet Javan hawk-eagle for the magazine Femina. Many of the eagles seen in zoos during the 1990s and 2000s were young birds. Their blueish eyes, which turn yellow with age, pointed to nest capture rather than successful captive breeding.

Research reshapes the picture

The early picture of the species was built on very limited surveys. Researchers estimated that fewer than 60 pairs remained, living in five or six forest fragments separated by areas inhabited by millions of people. The eagle was so poorly known that, when fieldwork began, large eagles on Java were often described under the same broad label. That changed as the Javan hawk-eagle gained attention from researchers.

Today, university students study the bird, its habitat and its distribution year after year. A dedicated community of raptor enthusiasts also monitors and works to protect the species. Researchers now know more about the eagle than ever before, and early population estimates proved too low by an order of magnitude. Observations on Bali have also shown that its range extends beyond Java.

Greater knowledge has not ended the pressures on the species. Trade and continuing habitat loss remain its main threats. Eagles once sold in bird markets are increasingly offered through e-commerce platforms and social media. The combination of persistent demand and hard-to-reach nest sites makes monitoring and protection difficult.

Nest protection and releases show progress

There are signs that targeted conservation can help. Nest protection programs have been successful, and rehabilitated birds have returned to the wild. Zaini Rakhman, chairman of Raptor Indonesia, says that from 2001 to 2021, 40 Javan hawk-eagles that had been confiscated or surrendered were released; 27 survived in their new habitats.

In 2023, two eagles born in an Indonesian zoo were released into a national park in western Java. Their release points to a role for carefully managed captive breeding, while the survival figures for released birds show why post-release monitoring matters. Rakhman says the eagles’ presence helped support the designation of forests on Mt. Murio in central Java as a Grand Forest Park. Protection for additional forest areas is under review.

The bird’s conservation story also reflects a shift in who studies and values it. In the early 1990s, the first people documenting the species and its prospects were non-Indonesian birders, whether residents or visitors. Hans Bartels, the ornithologist whose family name is part of the eagle’s scientific name, believed its survival depended on Indonesia’s younger generation. Indonesian students and conservationists now play a growing role in building knowledge and protecting habitat.

That work has found a public home as well. In December 2025, the Bartels Javan Hawk-Eagle Conservation Museum opened in a historic building that had once been the Bartels family’s private residence. The eagle’s designation brought attention, but attention alone could not secure its future. The practical test now is whether nest protection, habitat conservation and action against trade can keep pace with the bird’s growing place in Indonesia’s identity.

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