A five year-old tigress, tagged T-4, has become the world's first feline reared in captivity and shifted to the wild to spawn two cubs at Madhya Pradesh's Panna Tiger Reserve (PTR). "This is for the first time in the world that a semi-wild tigress shifted to the wild has adjusted to new environs and begotten cubs. The tigress was born in May 2006 in the Kanha Tiger Reserve and within days had mother had died," PTR field director R S Murthy told TOI. T-4 was reared in an enclosure and fed by the Kanna staffers. The semi-wild tigress was carted out to Panna and released into the wild on March 27 last year. There were apprehensions about the tigress' survival in the wild, given that she was reared in an enclosure. But, she took to the jungle easily. Here she met a translocated tiger, and mated. She delivered two cubs, and one of them was spotted by a PTR official on December 15. T-4 and her two cubs have now started moving out of their den since last week.