Se https://www.bbc.com/news/science-environment-54285627
By analysing the calls of sparrows recorded over decades, scientists confirmed a change in the birds’ vocal repertoire when the city fell quiet.
Se https://www.bbc.com/news/science-environment-54285627
By analysing the calls of sparrows recorded over decades, scientists confirmed a change in the birds’ vocal repertoire when the city fell quiet.