The six-month-old panda cubs, born on August 7, could be seen doing somersaults, climbing tree branches and cuddling each other in their pen.
Giant pandas are no longer on the 'endangered' list
"The twins love to climb up high. Their sharp claws make for a good hold," zoo director Dagmar Schratter said in a statement.
"If they do tumble down from time to time they land safely on a thick layer of hay."
Panda twins born in China's Sichuan province
While the brother and sister pair enjoy nibbling on tender bamboo leaves, their giant mother Yang Yang still suckles them once or twice a day, Schratter said.
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