The Calgary Zoo in Canada is sending two giant pandas back to China due to a shortage of bamboo. A lack of flights due to the COVID-19 pandemic has caused issues with shipments of high-quality bamboo imported from China, forcing the zoo to make the difficult decision.

“When you’re looking after the welfare of animals, you need to put the politics and business aside,” said Calgary Zoo president Dr Clement Lanthier. “It is too much of a risk for the health and welfare of (the pandas).”

Er Shun and Da Mao have been in Calgary since March of 2018 and were expected to remain through 2024 as part of a 10-year agreement between Canada and China. The pair spent their first five years at the Toronto Zoo.

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The facility had originally been importing bamboo from China to Calgary directly but when those flights were cancelled due to the coronavirus crisis, they began receiving the bamboo via Toronto. However, when flights from China to Toronto were scaled back, it affected the regularity of their shipments. Delivery times were also slower than normal causing poor quality bamboo.

They began bringing bamboo in from the United States but Er Shun and Da Mao refused to eat it, preferring the taste of Chinese bamboo instead.

According to Dr Doug Whiteside, a senior veterinarian at The Calgary Zoo, this can happen because giant pandas have a specific taste and smell for bamboo and are selective eaters.