On March 9, ten thousands of Rook Corvus frugilegus could be seen on migration in Pyongyang, North Korea (DPRK), circling the city before roosting on trees at the banks of Potong River. In the south (in the ROK), you can also see flocks of many tens of thousands of Rook in Buan County and Ulsan in the winter. Now it is spring and these very same birds are on their northward migration back up through Korea, back to their breeding grounds in Northern China, Russia and Mongolia.
Large flock of Rooks Corvus frugilegus over Pyongyang cityscape © Bernhard Seliger
Circling Rooks © Bernhard Seliger
Birds roosting in the trees next to Potong River © Bernhard Seliger
Rooks at roost © Bernhard Seliger