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Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Dejun Kong conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Weixiong Luo performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Guoyue Huan performed the experiments, approved field study permission..

Zhuoqing Li contributed reagents/materials/analysis tools, prepared figures and/or tables.

Xiaojun Yang conceived and designed the experiments, reviewed drafts of the paper.

Field Study Permissions

The following information was supplied relating to field study approvals (i.e., approving body and any reference numbers):

Administrative Bureau, National Nature Reserve of Black-necked Cranes in Huize

Funding

This work was supported by National Natural Science Foundation of China (31201725) and the Applicable Basic Research Project of Yunnan Province (2012FB186). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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