Following the nocturnal bird migration study conducted in partnership with the Asian Infrastructure Investment Bank, Peking University and the Beijing Municipal Government, we have built up a store of tens of thousands of calls. To help support anyone wanting to study nocturnal migration in Beijing or indeed anywhere in north and east China, we have put together what we are calling a “Beijing Nocturnal Flight Call Library”.
The library, including most of the species we have recorded, can be found here. It is also available via the drop down menu under “Nocturnal Bird Migration in Beijing” in the menu bar.
The page provides examples of nocturnal flight calls (NFCs), including spectograms and audio files, all of which have been recorded in Beijing. Dates and recording location are given for each file.
Nocturnal recording is in its infancy in Beijing, so it is possible some of the identifications are incorrect. If you believe a call is incorrectly identified, please contact Wild Beijing via the contact form on the “Welcome to Wild Beijing” page. Thank you.
Some of the calls are of poor quality and will be replaced by better quality recordings as and when available.
Information provided about some of the species has been drawn from the following excellent websites from Europe:
The Sound Approach ; and
My heartfelt gratitude goes to colleagues at Peking University, including Professor Hua Fangyuan, Liu Shuangqi and Ren Xiaotong for their help and support.

Love this Terry! So cool to think about what happens when almost no one is watching/listening.
Yes, agreed! The invisible miracle happening over our heads as we sleep at night..