Batagur baska (Northern river terrapin) species protection project

Working hard for Batagur baska

Cooperation since:2010
Conservation status on the Red List:critically endangered
Location of the project:Bangladesh

The Northern river terrapin needs our help!
Donate now

Batagur baska (northern river terrapin) has become one of the three rarest turtle species in the world today. In the previous century these animals were widely distributed in the rivers of northeast India, Bangladesh and Myanmar. Unabated overfishing and egg collection brought this river terrapin to the brink of extinction. The turtle populations remained more or less stable as long as they were captured and consumed only to help cover the basic needs of local human residents. That all changed when the hunting took on industrial dimensions and enormous numbers of animals were exported to China at great profit. In 2010, only 20 individuals were still reported worldwide.


Four Northern river terrapins, including 2 pregnant females, were donated to Schönbrunn Zoo by the researchers and turtle experts Rainer and Peter Praschag from Graz in April 2010. The tireless father-son team tracks down endangered turtles around the globe and quite literally saves them from the cooking pot. In May 2010 the zoo successfully captive bred individuals of this species for the first time ever – a true sensation. This yielded a wealth of new information that proved to be highly valuable for subsequent captive-breeding efforts.

Controlled breeding in captivity was an essential emergency measure to ensure the survival of the species; this approach provided new insights for targeted conservation measures in the natural habitat. In cooperation with Peter Praschag, Schönbrunn Zoo initiated the rescue mission for Batagur baska in Bangladesh. The turtles, which can grow to a length of 60 cm, were tracked down in village ponds, purchased, and transferred to a captive-breeding center in Bhawal National Park, managed by the Bangladesh Forest Department. This facility guarantees protection for these rare animals and optimizes breeding efforts. To minimize the risks and as a base station for a future introduction project, a second facility in Karamjal was adapted in 2015 for part of the group. Both stations are now successfully captive breeding the turtles and raising the juveniles.


The declared aim is to enable steady reproductive success of the Northern river terrapin and thus ensure its long-term survival. The next step is to reintroduce the animals to suitable areas with the help of local residents. A prerequisite for such a reintroduction is to collect information about the habitat requirements, the migration routes and the nesting sites of the animals in Bangladesh, for which only very few data are available.

This is how Schönbrunn Zoo is supporting the project:

  • Long-term expertise of Anton Weissenbacher, Zoological curator at Schönbrunn Zoo, as a co-founder of the project and project supervisor
  • Funding of Rupali Ghosh (project leader in Bangladesh), project staff, equipment and turtle food
  • Research and conservation management
  • Financial support and donation acquisitions
  • Presentation of the project during guided tours and events
  • Protected in situ breeding and headstarting

Anton Weissenbacher, Project supervisor and Zoological curator, Schönbrunn Zoo: “The 'Batagur baska' project is currently one of the most successful zoo projects worldwide – thanks to the personal initiative of participating zoologists and partners, but above all to our sponsors. In a combined effort, we have successfully captive bred hundreds of individuals of one of the most endangered turtles in the world. We are hard at work to reintroduce this endangered species.”

This is what our partners have to say:

Peter Praschag, field biologist and turtle expert: “Time is very quickly running out for this species. The Northern river terrapin would simply go extinct within a few years without the successful captive-breeding programs in zoos and research stations."

Project partners:Prokriti O Jibon Foundation (POJF), Forest Department Bangladesh, Peter Praschag (Turtle Island Graz)
SponsorsZGAP, DGHT, Society of the Friends of Schönbrunn Zoo (Verein der Freunde des Tiergartens), OZO, EUAC, TSA, REWE, Edith Haberland Wagner Stiftung

Scientific publications on Batagur baska:

Weissenbacher, A., D. Preininger, R. Ghosh, A. G. J. Morshed & P. Praschag. (2015): Conservation breeding of the Northern River Terrapin (Batagur baska) at the Vienna Zoo and in Bangladesh. International Zoo Year Book 49: 31-41. DOI: 10.1111/izy.12070

Dedieu, A., Scherzer, N., Paumann, T., Morshed, A. G. J., Weissenbacher, A., Walzer, C., & Preininger, D. (2023). Camera Traps Provide First Insights into the Nesting Behavior of the Critically Endangered Northern River Terrapin (Batagur baska). Chelonian Conservation and Biology 22 (1): 46–57.