Panda twin cubs in Vienna zoo have opened their eyes

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VIENNA (Reuters) - Twin panda cubs born in early August at Vienna's Schoenbrunn Zoo have opened their eyes and are becoming more active, zookeepers said on Wednesday.

Giant Panda Yang Yang gave birth to the male and female babies on August 7. Panda cubs usually begin to open their eyes at around 30 to 45 days old and fully open them soon after that, the zoo's director Dagmar Schratter said in a statement, adding that they can now see light and dark contrasts.

The cubs, who have yet to be named, have also begun lifting their heads as well as kicking and playing on their mother's belly, the zoo said.

See more of the panda cubs:

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Twin Pandas born in Vienna zoo
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Twin Pandas born in Vienna zoo
CHENGDU, CHINA - SEPTEMBER 07: Image shows two panda cubs at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are held in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, the male and female panda cubs measure about 35 centimeters and weigh nearly 1 kilogram. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
CHENGDU, CHINA - SEPTEMBER 07: Two panda cubs are in their mother Yangyang's arms at Giant Panda Protection and Research Center on September 7, 2016 in Chengdu, Sichuan Province of China. Born at the Vienna Zoo in Austria, a male panda cub and a female panda cub with each full body length of about 35 centimeters and body weight of nearly 1 kilogram at present welcomed their full month on September 7. The two panda cubs were confirmed in health condition now. (Photo by VCG/VCG via Getty Images)
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