The 2019 zoonotic pandemic (COVID-19). has led to a massive global lockdown that provides a good opportunity to study how wildlife responds to changes in human activity. Wearing a mask after the COVID-19 outbreak was widely used to prevent the spread of the causative pathogen. It has been shown that tree sparrows (Passer montanus) at two sites in south China exhibit reduced fear respo... https://bursgaers.shop/product-category/water-bottle-cap/