In the space of just one year, three animals in the Antwerp ZOO gorilla group needed casts to treat their injuries. What initially appeared to be a coincidence gave veterinarian Jonas Spruyt and his team valuable practical experience in veterinary medicine, behaviour and group dynamics. This experience ultimately led to a unique solution for treating injuries in gorillas.
Science never stands still in our parks. Every day, researchers, keepers, vets and curators deepen their understanding of the animals we take care of and protect – both here and in their natural habitats. It’s time to reflect on a year of findings that truly impact animal welfare, conservation and species management. And, as always, our scientists are already looking forward, because there are still so many questions waiting for answers.
In autumn 2025, Planckendael ZOO became home to a new bull elephant. Upali’s arrival was crucial to the European species conservation programme that safeguards the genetic diversity of this endangered species. However, introducing a new bull to an existing herd is rarely straightforward, especially if you’re dealing with a species that literally weighs tonnes and has an exceptionally complex social structure.
It is common knowledge that women tend to live longer than men. This is true not only for humans, but for mammals in general. However, the reason behind this remained unclear for a very long time. Although we knew there was a difference in lifespan, we didn’t know what caused it: behaviour, environment or biology? An international team of biologists, including scientists from Antwerp ZOO, has now examined this topic as part of a large-scale research project.
Asiatic lions are extremely rare, and highly vulnerable. Only about 350 remain in the wild. This makes the species particularly at risk, and maintaining a healthy reserve population in zoos is vitally important. Every Asiatic lion plays a crucial role in safeguarding the future of the species. At Planckendael ZOO, we do everything we can to protect these endangered big cats. That’s why young Yarzar recently underwent an extensive medical examination, including both an MRI and a CT scan.
Herbivorous fish in the wild spend hours grazing on algae. Rather than eating one meal at a time, they take hundreds of small bites throughout the day. In an aquarium, this behaviour is harder to encourage because food is usually offered at set time. To promote this natural grazing behaviour, scientists at Antwerp ZOO examined a new form of enrichment: a 3D-printed feeding structure that encourages fish to search for and nibble at food in a way that closely mirrors their natural feeding habits.
Few people are aware of the extensive scientific research carried out behind the scenes at Antwerp ZOO and Planckendael ZOO. Every day, scientists are at work here on studies conducted into animal behaviour, health and well-being: from DNA analyses to determine paternity in chimpanzees to genetic research on the Vietnamese pheasant and cinereous vulture and fish welfare assessments. Hidden among the operating theatres, analytical equipment, observation rooms and laboratories is a space that plays a decisi
A new study has been launched behind the scenes at Planckendael ZOO to learn more about the way bonobos focus their attention. Using eye-tracking technology, the research team aims to investigate the role played by emotions in cooperative behaviour among great apes.
The okapi – a mysterious inhabitant of Congo’s forests – has been inextricably linked to Antwerp ZOO ever since 1919. Today this link remains as strong as ever. Together with its conservation branch, the Antwerp Zoo Foundation (AZF), Antwerp ZOO continues to fight for the survival of the okapi. Its efforts are now expanding to a new part of the okapi’s natural habitat: the Rubi-Télé region in Congo. A feasibility study is currently being carried out to explore how okapis in the wild can be better protected.
A red panda at ZOO Planckendael has given birth to two cubs. That is great news for Europe’s breeding programme and a good opportunity to reflect on the lot of their wild cousins. Because while these births are promising for the survival of the species, the red panda remains under threat in its natural habitat.
How do you work out who fathered a baby chimpanzee when there are five adult males in the group? And why does it matter? A single hair sample and DNA analysis not only establish paternity, but are also crucial for breeding policy, parentage studies and genetic management in the European breeding programme. Find out how genetic material is collected, analysed and interpreted at Antwerp ZOO.
Antwerp ZOO has successfully raised three Chinesemergansers. Breeding this striking and endangered duck species is rarely successful in European zoos, making this a truly exceptional achievement.