![A four-month old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, western Germany, Jan. 9, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/01/10/96a92e9a17f9487c8d594e774c876357.jpg)
A four-month old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, western Germany, Jan. 9, 2019. (Photo/Agencies)
![A four-month old panther turtle is weighed during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/01/10/7a41a7e1d0874caeaaa8abfb3f7e5c69.jpg)
A four-month old panther turtle is weighed during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)
![A four-month old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, western Germany, Jan. 9, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/01/10/0387cea7f66b447aa4504d604e8c16ba.jpg)
A four-month old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, western Germany, Jan. 9, 2019. (Photo/Agencies)
![A ten-year old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/01/10/7fbdd3269faa4e6b85303d532083cfed.jpg)
A ten-year old panther turtle is measured by a vet during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)
![A ten-year old panther turtle is measured upside down during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)](http://www.ecns.cn/hd/2019/01/10/54108e0f949f4f57aac37b79d5307e0a.jpg)
A ten-year old panther turtle is measured upside down during an annual stocktake at the Zoo in Duisburg, Germany, Jan. 9, 2019. (Photo/Agencies)