Avian Research will cease to be published by BMC as of 1 January 2022. Please visit https://www.keaipublishing.com/en/journals/avian-research/ for future publications of Avian Research. For submission-related questions, please contact the editorial office directly via pjcheng@bjfu.edu.cn. BMC will continue to host an archive of all articles previously published in the journal, and all articles published in Avian Research during its time with BMC will remain fully searchable via the BMC website.