Combining Tracking and Remote Sensing to Identify Critical Year-Round Site, Habitat Use and Migratory Connectivity of a Threatened Waterbird Species

We tracked 39 western flyway white-naped cranes (Antigone vipio) throughout multiple annual cycles from June 2017 to July 2020, using GSM-GPS loggers providing positions every 10-min to describe migration routes and key staging areas used between their Mongolian breeding and wintering areas in China's Yangtze River Basin. The results demonstrated that white-naped cranes migrated an average of 2556 km (& PLUSMN;187.9 SD) in autumn and 2673 km (& PLUSMN;342.3) in spring. We identified 86 critical stopover sites that supported individuals for more than 14 days, within a 100-800 km wide migratory corridor. This study also confirmed that Luan River catchment is the most important staging region, where white-naped cranes spent 18% of the annual cycle (in both spring and autumn) each year. Throughout the annual cycle, 69% of the tracking locations were from outside of the currently protected areas, while none of the critical staging areas enjoyed any form of site protection. We see further future potential to combine avian tracking data and remote-sensing information throughout the annual range of the white-naped crane to restore it and other such species to a more favourable conservation status.

Automated summary

The study showed that white-naped cranes migrate an average distance of 2556 km in autumn and 2673 km in spring, identifying 86 critical stopover sites with the Luan River catchment as the most important staging region. However, the critical staging areas identified in the study currently lack any form of protection.