File photo taken on March 16, 2020 shows glossy ibises foraging in Jianhu Lake wetland nature reserve in Jianchuan County, southwest China's Yunnan Province. A group of rare ibis, once thought extinct in China, have been spotted in a nature reserve in southwest China's Yunnan Province. Eight glossy ibises were first sighted by workers in Jianhu Lake wetland nature reserve in Jianchuan County during a patrol in early June. Through follow-up monitoring and observation, researchers have found three young birds in the nest of the glossy ibis. (Jianhu Lake wetland nature reserve/Handout via Xinhua)

File photo taken on June 17, 2020 shows a glossy ibis and its nestlings in Jianhu Lake wetland nature reserve in Jianchuan County, southwest China's Yunnan Province. A group of rare ibis, once thought extinct in China, have been spotted in a nature reserve in southwest China's Yunnan Province. Eight glossy ibises were first sighted by workers in Jianhu Lake wetland nature reserve in Jianchuan County during a patrol in early June. Through follow-up monitoring and observation, researchers have found three young birds in the nest of the glossy ibis. (Jianhu Lake wetland nature reserve/Handout via Xinhua)

File photo taken on July 1, 2020 shows glossy ibis nestlings in Jianhu Lake wetland nature reserve in Jianchuan County, southwest China's Yunnan Province. A group of rare ibis, once thought extinct in China, have been spotted in a nature reserve in southwest China's Yunnan Province. Eight glossy ibises were first sighted by workers in Jianhu Lake wetland nature reserve in Jianchuan County during a patrol in early June. Through follow-up monitoring and observation, researchers have found three young birds in the nest of the glossy ibis. (Jianhu Lake wetland nature reserve/Handout via Xinhua)