Birds in San Francisco started singing differently in the silence of the pandemic shutdown CNNBirds sang a 'sexier' tune during San Francisco's coronavirus lockdown, study finds USA TODAYHow COVID-19 Caused Birds to Up Their Song Quality in the San Francisco Bay Area SciTechDailySan Francisco birds sing differently in the pandemic msnNOWThe Quiet of Covid-19 Has Birds Singing Sultrier Songs GizmodoView Full Coverage on Google News