The Berlin Zoo protects the nest of hornbills in India.


Project name: Hornbill Nest Adoption Program

Species: Various hornbills (Bucerotidae)

IUCN threatened status: Various

Project location: Pakke Wildlife Sanctuary, Arunachal Pradesh, India

Greatest threat: Loss of habitat; hunting

Response: Deploying guards to protect nests

The bird with a horn
Hornbills are a family of birds characterized by a very long, thick, down-curved bill that resembles a horn. There are around 50 different species of hornbill, and most of them also have a spongy growth on top of their beak called a casque. Hornbills are at home in Africa, Southeast Asia, and India. Several species of hornbill can also be found at Zoo Berlin.

Biodiversity at the foot of the Himalayas
The Pakke Wildlife Sanctuary is situated in the northeastern Indian state of Arunachal Pradesh, at the foot of the Himalayas. This national park is considered one of the best-protected nature reserves on the whole of the Indian subcontinent. It is situated in a biodiversity hotspot in the Eastern Himalayas and has elevations ranging from 100 to 2,000 m above sea level. Pakke is home to more than 2,000 species of plant and 400 animal species – many of which are threatened. The threatened species include mammals like tigers, leopards, bears and elephants, but the 860 km² park is also home to an impressive diversity of bird life. Four species of hornbill live here: the great hornbill (Buceros bicornis), the wreathed hornbill (Rhyticeros undulatus), the rufous-necked hornbill (Aceros nipalensis), and the oriental pied hornbill (Anthracoceros albirostris).

The threat of humans
However, even in this protected area, hornbills are at risk from loss of habitat. The growing human population and the associated rise in demand for agricultural land has led to forest clearance throughout India and Southeast Asia – posing a great threat to biodiversity in the region. The second major threat facing hornbills is hunting. These extraordinary birds are hunted for food, but also as trophies.

Cracking down on hunting
The Pakke Wildlife Sanctuary is ramping up efforts to protect the nests of the threatened hornbill species. The forestry authorities are working with the local population and organisations such as Hornbill Watch to monitor the hornbills. Anyone found hunting hornbills or destroying their nests by cutting down trees during the breeding season is subject to a penalty. It is also illegal to kill male hornbills, as if a father bird dies, so do the mother and chicks dependent on him.

Adopt-a-nest scheme
A very well-thought-out conservation project to monitor and protect the hornbills has been running in the region since 2003. This nest adoption project brings local villagers together with bird lovers from Indian cities in pursuit of a common goal – protecting biodiversity. Nine villages around the Pakke Wildlife Sanctuary are currently participating in the project. They provide “nest guards” who find the hornbill nesting sites and make sure that the trees in question, and the birds nesting in them, remain undisturbed. The city dwellers – who are relatively wealthy compared to the rural population – provide the funding by “adopting” a nest. In return, they receive regular updates about what is going on in “their” nest.

The key role of nest guards
Many of the nest guards have an influential role in their villages, or are former hunters who now make a living from protecting the birds. This means that they also function as conservation ambassadors, helping to raise awareness among locals of the need to protect their environment and the creatures who live there. The urban-rural network established by the project has also created an additional source of income for the villagers, as tourists now come to the Pakke Wildlife Sanctuary to observe the birds. These birdwatchers report their hornbill sightings and submit photographs, helping local conservation organisations to gain an improved overview of hornbill numbers and prioritise important sites for conservation. Zoo Berlin, too, supports the nest guards who are working so hard to safeguard the future of these hornbills.


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