Is it a bird, is it a plane ... no, it's a HOAXER!

The Dutchman who posted a video on YouTube claiming that he had taken to the air in a park with a pair of huge fabric wings attached to his arms has admitted it was all a fake.

'Jarno Smeets' went on a TV show in the Netherlands to reveal that his name is in fact Floris Kaayk and that rather than being a mechanical engineer he is in fact a film-maker and animator.

He said the clip was the result of an online media experiment that he had been working on for eight months.

Soon after the footage was posted earlier this week the clip went viral but soon comments were left questioning its veracity.

One wrote 'looks like the wings transition to CGI when that guy runs in close and covers most of the frame ...'

Another added 'funny how the grass' green changes shade in between the cameras'.

The technology and gadgets site Gizmodo reported the scepticism of Industrial Light and Magic's technical director Ryan Martin before the revelation that it was all a hoax.

                                           [Related link: Biker's terrifying mountain run]

"They're able to afford to build this thing, but can't invest in proper video equipment, or … a tripod," he told the website. "If I were to make a fake video with the intention of going viral, I would make certain that the quality was as poor as possible to disguise any flaws in poor CG work."

He backed up his view by adding several experts at ILM had come to the conclusion that the video was a hoax, relying on computer generated imagery.

Wired magazine also did some fact checking on 'Smeet's' alleged background and said it has been unable to verify several claims made in his online resume.

In the posted video 'Smeets' had proudly declared: "We did it! This weekend I flew a 100 meters with my self-built wings. I used a GoPro-camera on my helmet to film the flight."

"I have always dreamed about this. But after 8 months of hard work, research and testing it all payed [sic] off. Enjoy!'

The footage was posted on YouTube and nearly 700,000 saw it in little over a day. But the clip soon provoked a row between those who praised the achievement and others who cast doubt as to whether or not it was genuine.

But there were many who just enjoyed watching the video.

'I don't know if this is real or not ... But damn is it cool! If they ever start selling these things, I'm totally buying a pair,' wrote one.

The video showed "Jarno" in a park with friends with a camera attached to his helmet. A friend switched it on and then as they ran away he appeared to start to run and flap his 'wings'.

Uplifting music was added and then in the corner of the image you saw the view from "Smeet's" helmet.