The toll of roads – on us
Do you remember noticing more birdsong during the Covid lockdown? You weren’t imagining it.
earth watch Simon Marsh
Scientists who were studying the impacts of traffic noise on the songs of urban white-crowned sparrows in San Francisco found that their songs – normally louder, higher-pitched and less complex – reverted to the quieter, lower and more complex songs of their rural cousins, and could be heard more than twice as far.
