Colombia is still anxiously awaiting news of the four children which survived a plane crash but were lost in the Amazon jungle in the southern part of the country on May 1. But yesterday was Thursday army dog who participated in the investigations lost in turn in the dense vegetation.

Wilson, a six-year-old Belgian shepherd, “disappeared in the jungles of Kaketa and Guaviare,” the army said on Twitter.

Along with dozens of other specially trained dogs, Wilson has been involved in the armed forces’ operations to find the children from the beginning.

Aged 13, 9, 4 and 1 – the oldest and youngest are girls – the children have been wandering alone in the Colombian jungle for some forty days after the May Day crash of the Cessna 206 they were in, along with their mother and two others adults. All three adult occupants were killed, their bodies recovered by military personnel at the crash site.

The children, who belong to the indigenous Uitoto tribe, are familiar with life in the jungle and know how to survive, according to their relatives.

But their chances of survival diminish with each passing day in the extremely hostile environment where jaguars, pumas, reptiles and other predators seek prey.

Dissidents of the former FARC rebel organization are also active in this area, specifically members of a group with which peace negotiations were recently interrupted.

In late May, the military said it may have come “very close” to the missing children.

It was Wilson the dog who found the 11-month-old baby Christine’s bottle in the thick vegetation.

Always according to the army, “one of the hypotheses” for the dog’s disappearance is that “due to the complexity of the terrain, humidity and adverse weather conditions, it became disoriented.”

However, the military also said that “tracks that may belong to children were found near tracks that may be those of the dog,” without specifying whether it made the second assumption that Wilson and the children were walking side by side.