Miracle as three-year-old boy who vanished in thick bushland wearing his Spider-Man pyjamas is found ALIVE by his grandfather

A three-year-old boy has been found safe and sound after a desperate seven-hour search through dense bushland in Western Australia.

James O'Reilly vanished from a house at about 7.30am on Saturday at Karli Rise in Yallingup, south of Perth.

A frantic police search continued throughout the day for the blonde haired, blue-eyed toddler who was last seen wearing white Spider-Man pyjamas.     

Eventually it was his grandfather who found the boy asleep in dense bushland kilometres from the house. 

His first words to his grandfather were that he was hungry. 

James O'Reilly, 3, has been found safe and sound after a desperate search in Western Australia

James O'Reilly vanished from his house at about 7.30am on Saturday at Karli Rise in Yallingup, south of Perth

WA Police said little James had been exposed to the rough terrain and poor weather conditions, and that arrangements have been made for him to have a medical check-up.   

James' family on Friday arrived at the Airbnb that he went missing from, according to the West Australian.

It's believed James wandered away from the rental property while following the family's two dogs. 

Wadandi elder Billy Webb, who was involved in the search, said the boy's father was 'distraught' when he spoke to him on Saturday.   

'The father came wandering through the bush shouting out the name and I was wondering, "Who's walking across our property shouting around", sort of thing,' he told WA Today.

A frantic search for the child was launched earlier in the morning (pictured: SES teams search bushland looking for James)

WA Police said little James had been exposed to the rough terrain and poor weather conditions. (pictured: SES teams search bushland looking for James)

'Then I found out that his boy was gone. He was distraught, he was really worried and just sort of wandering around, trying to do a little bit of a grid with his dog.

'Apparently he the just wandered out of the little play area. This is pretty dangerous sort of country and it's really thick bush, this is one of the most dangerous precincts in the whole Capes region.'

In addition to his Spider-Man pyjamas, James was wearing thick wellington boots, which would have helped immensely in the 'appalling' weather.   

Inspector Martin Voyez said the area had been battered by strong winds, heavy rain, and even hail.

'The terrain around the holiday home is very thick, dense bush and very difficult for people to walk through ... however we will continue to search for little Jimmy until he is found,' Inspector Voyez promised earlier in the day. 

The exhaustive search included a police helicopter, search dogs, mounted units were State Emergency Services volunteers and locals residents who wanted to help. 

In a statement posted to Twitter, the state's police force said: 'WA Police Force thanks all the emergency service volunteers and community members who assisted with the search. '

His first words to his grandfather were that he was hungry. He has now been taken to hospital for a check-up