Researchers still don't know exactly why the spider builds this unique structure

Video of a spider hatching from the web has been captured for the first time

During an expedition to Peru, a photographer realised it was a spider's web

Dubbed 'silkhenge', the picket fence structure was first discovered in 2013

Video has been captured of baby spiders emerging from mysterious 'silkhenge' structures for the first time.

The strange white picket-fence structures were discovered in the Peruvian Amazon in June 2013.

Their origin had remained a mystery until a photographer spotted a baby spider hatching from one of the Stoneheng-like structures almost six months later.

Video has been captured of baby spiders emerging from mysterious 'silkhenge' structures (pictured) for the first time. The strange white picket-fence structures were first discovered in the Peruvian Amazon in June 2013

MYSTERY OF THE PICKET FENCE The first of the structures was spotted in June 2013, by Troy Alexander, a graduate student at Georgia Tech. H e discovered the bizarre formation on the bottom of some blue tarpaulin close to the Tambopata Research Center, in southeastern Peru. The discovery of the spider itself was made by wildlife photographer Jeff Cremer during an expedition to Peru. Mr Cremer found that the spider species makes a central tower on a tree trunk and forms a circular fence around the outside. At the base of the tower, the spider lays its eggs. Mr Cremer and his team said they only realised this when one of the spiders hatched and appeared from the bottom. Advertisement

And the first video captured of this arachnid hatching may provide vital clues to the spider's species, and why it builds silkhenges.

The structures consist of a fence-like circle around a central tower, which is where the baby spiders hatch from.

The spiders that build these elaborate structures still remain unidentified three and a half years after they were first discovered.

And no one has ever seen one of the mystery spiders build one of their web towers.

'The video gives us more puzzle pieces to overall solving this thing,' tropical biologist Phil Torres, one of the first people to observe the structures at the Tambopata Research Center in the Peruvian Amazon, told National Geographic.

'This was just such a rare glimpse at these Silkhenges.'

Since silkhenges were first discovered, scientists have found the web structures in Peru, French Guiana, and Ecuador.

But most have been seen near Tambopata.

The white picket fence structures, left, are the work of a tiny spider, right, that builds it webs on trails lined by cecropia trees in Tambopata National Reserve in Peru

Since silkhenges were first discovered, scientists have found the web structures in Peru, French Guiana, and Ecuador, but most have been seen near Tambopata in southeastern Peru, where they were first discovered in 2013

The structures' origin had remained a mystery until a photographer spotted a baby spider hatching from one almost six months later. Pictured here is a baby spider as it emerges from one of the silkhenge's central towers

The first video captured of this arachnid hatching may provide vital clues to the spider's species, and why it builds the 'silkhenge' towers

The structures consist of a fence-like circle around a central tower, which is where the baby spiders hatch from. The spiders that build these elaborate structures still remain unidentified three and a half years after they were first discovered

Researchers had no idea what was making the unique webs until a tiny orange spider hatched from an egg next to them in late 2013.

This discovery was made by wildlife photographer Jeff Cremer during an eight-day-long expedition to the reserve. At the base of the tower, the spider lays its eggs. Mr Cremer and his team said they only realised this was the case when one of the spiders hatched and appeared from the bottom. The structures themselves were first spotted in June by Troy Alexander, a graduate student at Georgia Tech. Mr Alexander discovered the bizarre formation on the bottom of some blue tarpaulin close to the Tambopata Research Center. He then found three more of the enclosures on tree trunks in the jungle, telling Wired.com that the fences measured around two centimeters across. The first of the structures was spotted in June 2013 by Troy Alexander, a graduate student at Georgia Tech. He discovered the bizarre formation on the bottom of blue tarpaulin close to the Tambopata Research Center, in southeastern Peru Since silkhenges were first discovered, scientists have found the web structures in Peru, French Guiana, and Ecuador. In this image, we see a birds-eye-view of a baby spider hatching from one of the silkhenges During a 2013 expedition to Peru, wildlife photographer Jeff Cremer discovered that the spider species, pictured, makes a central tower on a tree trunk and forms a circular fence around the outside. At the base of the tower, the spider lays its eggs

To discover what the structures were, or which creature had made them, Mr Alexander posted pictures on various websites asking for any detail that could explain their origin.

Mr Torres, originally from Tambopata, then attempted to help Mr Alexander by posting a link on Twitter to the pictures, equally baffled as to their origin.

Mr Cremer, now 38, is from Pueblo in Colorado, but had lived in Peru for nearly eight years.

He said at the time: 'We were there on a scientific expedition to find out what was making these strange web structures.

'This was the first expedition to find out what they were.

'We were able to find out what was making the web structures when some of the eggs inside the towers hatched and a tiny spider came out.'

As well as trying to determine the species, researchers still hope to discover why the spiders build the structures, and what they are used for.

To discover what the structures were, or which creature had made them, Mr Alexander posted photos, pictured, on various websites asking for any detail that could explain their origin. Many scientists and experts said they had no idea how the structures had been made 'We think the walls may be used to capture tiny mites that we found,' Mr Cremer said at the time. 'Either that or it may be to provide protection from ants with a barrier to keep them away from the tower structure where the eggs are kept. 'The web structure could also be used as camouflage since it resembles fungus and lichen. 'What we do know now is the base of the tower contains spider eggs.