A mother is walking through the park with a small boy following behind, dribbling a football. A squirrel runs across their path.
"I used to see red squirrels when I was little," says mum. The boy isn't listening. He's doing commentaries to himself as he jogs along.
" There were lots of them at my Auntie Jo's house," she says. The boy kicks the ball against the fence and makes a crowd noise. His mum sighs.
"They're mostly grey squirrels now."