As for the other advantage, the birds were recorded singing in a lower amplitude than before. The huge drop in city noise allowed the male birds to sing at a softer pitch. As a result, their songs "sounded better, they sounded sexier," said Elizabeth Derryberry, lead author of the study, in an interaction with AFP.
The scientists found that the volume of the songs by these birds had dropped by almost a third. "They were better competitors, and they sounded like better mates to females," Derryberry added.
A similar study recently highlighted that a smarter, more aggressive breed of rats might emerge out of the COVID-19 pandemic all over the world. The research mentioned that the shutdown due to the Coronavirus pandemic has left the rats with no food from their regular source. Just another impact of humans on animal behaviour found during the lockdown.
