Best buds: Conservationist Valentin Gruener, 27, raised Sirga after she was abandoned by her pride
New challenge: A documentary series follows Sirga and Mr Gruener as he teaches her how to hunt
As Sirga does not have a pride to teach her how to hunt, Mr Gruener has to get down and dirty and show her
In order to teach her how to live as a wild lion, Mr Gruener has spent many hours crouching in scrubland or pouncing in watering holes alongside Sirga
Success? A proud Sirga managed to catch a large swollen toad, and carried it in her mouth
With no pride to teach Sirga how to hunt Mr Gruener made a commitment to help her become a self-sufficient hunter - showing her how catch her own food in the bush.
'She learned to be patient, to stalk and go into ambush,' said Mr Gruener, who spent many hours crouching in scrubland or pouncing in watering holes alongside Sirga.
'The day she brought down her first antelope was the most amazing day of my life, because I realised that she would one day be able to look after herself in the wild,' he added proudly.
'It's an extraordinary story that transcends all known borders between man and lion, predator and prey,' said Jurgen Jozefowicz of Tauana Films.
Meanwhile Mr Gruener is fulfilling a lifelong ambition by living with lions in the wilds of Africa.
'It was always my dream since I was a small child,' he said.
'Now, to be in this environment, it's just amazing. I actually made it. I live here, I've raised a lioness, I can go hunting with that lioness,' he added.
As one: Mr Gruener is fulfilling a lifelong ambition by living with lions in the wilds of Africa
Family: Mr Gruener observes as a veterinarian cares for his beloved lioness friend
The new documentary has been called an 'extraordinary story that transcends all known borders between man and lion, predator and prey' by its makers
Sustainable living: A team from the Modisa Wildlife Project feed a group of young male lions in an enclosure
'I spend every day of my life out here. I'm simply living the dream I've always had,' added Mr Gruener, who credits the landowner Willie De Graaff for giving him the opportunity to save Sirga.
To protect his livestock De Graaff once shot lions on his game farm. He later vowed to stop killing the majestic predators and converted into an avid conservationist.
'Willie gave me the chance to realise my dream to care for lions,' said Val.
'Without him I would not have met Sirga - and she has taught me more in three years than I could learn anywhere else in a lifetime,' added the wildlife enthusiast, who works in close collaboration with Mikkel Legarth 32, his co-founder at the Modisa Wildlife Project.
After many months of grueling work in the bush the filmmakers are delighted with the tender narrative that emerged.
'To walk with a lion in the wild, to record a unique friendship and capture the story of a young lioness born into captivity, and her development from naive novice to adult huntress, has been a once-in-a-lifetime experience,' said producer and DOP Jurgen Jozefowicz.
The touching documentaries titled 'Lionheart' are due for worldwide release in 2015.
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