The poisoned birds were discovered by a wildlife photographer on Sunday, who raised the alarm that the birds were unwell.
“Two of them are in a serious condition but are not critical. All of them may continue their migration after their recovery,” Rong said.
Other birds, including wild ducks, have also been killed. The bodies of the rare white storks will be given to the local natural museum. Many volunteers and officials from the government have been working in the reserve to save more poisoned birds.
Rong said there was a tradition of hunting before the 1980s in the area, and these white storks can be eaten in the hours after being poisoned.
The local police bureau started investigating the matter on Sunday.
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