The doors of two cages opened. Two crested ibises flew out one by one. There are three shelters in northwest China's Yangxian County, also home to the country’s national nature reserve for the endangered bird, crested ibis. Longting shelter is mainly responsible for treating hurt birds that conservationists and local farmers rescue in the wild. At this time of the year, fledglings begin their first attempts to fly, which result in more reported incidents.