One forest ranger told The Associated Press that "the girl was naked and was very comfortable in the company of monkeys".
She exhibited violent behavior in reaction to human contact and was unable to speak or communicate effectively, leading healthcare professionals to the conclusion that this was a case of a feral child raised in the wild by animals.
The district chief forestry officer told United Kingdom paper The Guardian the girl was actually found on a roadside near the forest, and while there were monkeys nearby, his rangers "never found this girl living with monkeys". They figured she must have lived with the monkeys for years. Villagers coming from a local market passed through a road built inside the wildlife sanctuary and found her sitting on the side and a few monkeys were reportedly close by.
The forest is closely monitored by rangers and CCTV, and it was unlikely she could have survived in the wilderness for long without being spotted, he added.
She will be sent to a home for juveniles until she is identified, Singh said. "So all the more [evidence] she was left there".
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"She is still not able to speak, but understands whatever you tell her and even smiles", he said.
Singh, who accuses a sub-inspector of fanning the Mowgli story, believes the theory of her living with monkeys caught on as she would eat food that she spilled off the floor, and kick anyone who approached her. "She used to move around using only her elbows and her knees".
Doctors in Uttar Pradesh state have been treating her since she was discovered in January.
"She behaves like an ape and screams loudly if doctors try to reach out to her", Singh told the New Indian Express.
It was not immediately clear from where the girl went missing and if the family had sought police help to trace her. The girl would be kept with other children and would be made to learn through "habit formation", and the first thing she would be taught is to brush her teeth. This indicates that she was raised by humans. "So it was taken that she had been living in the jungle for long", he said.