'Why do bluebottles come in the house when they have the world to fly in?'

“It’s the start of the bluebottle season,” says Davy in Bangor, “but why do they insist on coming into the house when they have the whole world to fly in?”
“Bluebottles are looking for decaying food,” says Leonard in Newtownards. “If you hide your green food bin they will soon disappear.”
“I don’t understand it,” says Davy. “I keep my caddy at the front porch! Why do they come in the back?”
“So why do you put it at the front? Our is at the back. They don’t even know it’s ours. I don’t even put the number on it, just to confuse them.”
With music from Cliff Richard, John Denver, Electric Light Orchestra, and more.