Researchers at Griffiths University in Australia have tackled the age-old question of why birds do, or don't, cross the road. After hours observing birds near and crossing roads around Brisbane, they found that many birds - particularly small, forest-dwelling species – avoid crossing roads, even when they can fly across them. The bigger the road, the stronger the effect.
They’re not sure exactly why, but say it may be fear of exposing themselves to predators. Or, they may be using roads as territorial boundaries.
Either way, they say it's a concern for bird species and ecosystems increasingly fragmented by roads.
Read more here.