Giant panda produces surprise twins at Vienna Zoo

The giant panda that gave birth at Vienna's Schoenbrunn Zoo last week was hiding a tiny little secret — an extra cub.

The zoo originally announced the birth of a one cub Aug. 7. On Tuesday it said mother Yang Yang actually bore twins, her fourth and fifth cubs after Fu Long, Fu Hu and Fu Bao.

The fact that it took a while to discover the second cub is not surprising. The birth was observed by camera only. And newborn pandas are tiny: The cub whose birth was announced last week was just 10 centimeters (4 inches) long and weighed 100 grams (3.5 ounces).

The Schoenbrunn Zoo says no other European zoo has managed to breed giant pandas by natural means.

Giant Panda Has Surprise Twins at Vienna Zoo
Giant panda gives birth to surprise twins at Vienna's Schoenbrunn Zoo. http://abcn.ws/2aXC5v5
Posted by ABC News on Tuesday, August 16, 2016

ExploreInformation from ABC News was used in this report.

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