This video says about itself:
5 million Bramblings (Fringilla montifringilla) in Slovenia
Zasavje region, central Slovenia, January 2019.
This video says about itself:
Flyby of Bramblings gathering at roosting site in Zasavje region, Slovenia, on 24th of January 2019. Flyover of MEGA flock lasted for 30 minutes! Estimated 5 million birds gathered at a roosting site.
Read more here.
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