Aww! Canada's Calgary Zoo set to return two pandas to China because it can't get enough bamboo to feed them

The Calgary Zoo in Canada is sending two giant pandas back to China due to a shortage of bamboo.

The zoo said in a statement that it usually flies in bamboo from China to feed the animals, but the Covid-19 pandemic had disrupted flights and caused delays in supplies.

The duo, named Er Shun and Da Mao, were supposed to stay in Canada until 2023 as part of a 10-year agreement with China, but the zoo decided to send them back early out of concern that delays could worsen if there's a second wave of coronavirus cases.

A panda's diet consists almost entirely of fresh bamboo, the Calgary Zoo said, and the animals typically eat about 40 kilograms (88 pounds) of it each day.

Much of the bamboo Er Shun and Da Mao ate before the pandemic was flown in directly to Calgary from China, but those flights have been canceled.