https://www.soscisurvey.de/birds_corona/
Stay healthy,
Christoph & Piotr
More information:
It is a scientific study, and you can check my profiles on the website
of the University of Tübingen/MNF, researchgate, eBird, facebook (BioDidaktik
Tübingen), etc.; I am a birder myself, working at the intersection of biology
& social sciences, so thank you all for helping us getting a clearer
picture how corona impacts on social/psychological aspects of a leisure
activity.
Please take care and stay healthy,
Christoph