Last answer to become instant millionaire...

will you be bothered how you arrived at it?

Mick, from Dublin, appeared on 'Who Wants To Be A Millionaire'  and towards the end of the program had already won 500,000 euros.

"You've done very well so far," said Chris Tarrant, the show's presenter, "but for a million euros you've only got one life-line left, phone a friend. Everything is riding on this question. Will you go for it?"

"Sure," said Mick, "I'll have a go!"
"Which of the following birds does NOT build its own nest?

a) Sparrow;

b) Thrush;

c) Magpie; or

d) Cuckoo?"

"I haven't got a clue," said Mick, 

"So I'll use my last lifeline and phone my friend Paddy back home in Dublin."

Mick called up his mate, and told him the circumstances and repeated the question to him.

"Fookin hell, Mick!" cried Paddy."Dat's simple it's a cuckoo."

"Are you sure?"

"I'm fookin sure!" said Paddy.

Mick hung up the phone and told Chris, "I'll go with cuckoo as my answer."
"Is that your final answer?" asked Chris.

"Dat it is."

There was a long, long pause and then the presenter screamed,

 "Cuckoo is the correct answer! Mick, you've won 1 million euros!"

The next night, Mick invited Paddy to their local pub to buy him a drink.

"Tell me, Paddy? How in Heaven's name did you know it was da Cuckoo that doesn't build its own nest?" 

"Because he lives in a fookin clock!" replied Paddy.

Link