Two young brothers who disappeared in the Amazon rainforest alone survived for 27 days off berries and rainwater.
Glaucon and Gleison, seven and nine, were found alive following their disappearance the previous month.
They were transferred by plane to a hospital in Manaus, the capital city of the northern Brazilian state of Amazonas, yesterday morning.
Paediatrician Eugenio Tavares was quoted in local media as saying: "Their condition is serious but stable.
"They are able to eat orally, urinate well, and their pulse is also normal. We will transition their diet, now it's liquid, then it will be in paste form.
"They need to gain at least 50 per cent of the weight they lost during this whole period to be able to return to Manicore.
"But there is no certain forecast for this to happen, until then we will continue to monitor them."
The youngsters went missing from their indigenous reserve in the municipality of Manicore, also in Amazonas, when they went hunting birds on February 18.
They were found severely malnourished and with abrasions on their skin after an extensive search on March 15.
They were found 22 miles from the spot where they went missing by a man cutting wood after the Fire Department had already called off the search.
The boys were initially taken to hospital in Manicore before being transferred to the better-equipped medical facility in the state capital.
And now it has been revealed that the boys survived their ordeal by eating the berries of the Couma utilis flowering plant, which are called 'sorva' locally and by drinking water from a stream and rainwater.
Their mum, farmer Rosinete da Silva Carvalho, told local media yesterday: "I asked, 'my son, didn't you eat anything?' He told me, 'we ate sorva, mum'.
"The boys always ate sorva because my oldest son would take it when he went hunting and whenever I saw it I took them a bag. So they were used to sorva.
"When the youngest couldn't walk anymore, they remained close by and drank water from a stream and rainwater."
The boys' recovery continues.
