Fri 25 Oct 2019 5.53 AM
Graffiti tags and other forms of vandalism at bus stops are oddly helping to save the lives of billions of birds.
Polish researchers have studied more than 80 different bus shelters across the country.
After carrying out almost 2,500 inspections every ten days, Poland's Academy of Science has concluded that birds are far less likely to collide with, and die, if the bus shelter has graffiti, dirt or artwork on it.
"Billions of birds die every year after hitting glass structures and our results suggest that collisions with glass bus shelters may be an important source of bird mortality," the authors said.