1. College of Life Sciences Shaanxi Normal University Xi'an 710119 China
2. Shaanxi Hanzhong National Nature Reserve of Crested Ibis Yangxian County, Hanzhong City 723300 China
3. Reintroduction Center of Crested Ibis, Ningshan County Forestry Bureau An'kang City 725000 China
4. Research Center for UAV Remote Sensing Shaanxi Normal University Xi'an 710119 China