This video shows carrion crows having fun with a flag.
This morning. A street rather busy with cars.
A wood pigeon.
In the middle of the road, a scrap of food.
A lesser black-backed gull tries to get it, but flies away.
Then, a herring gull and a carrion crow fight over it.
The herring gull wins.
The birds not just have to look out for rivals, but also for passing cars.
List of bird songs here.