Panda twins celebrate half-year birthday at Vienna zoo
"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."
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.






