One of the most famous tigers in the country of India, Collarwali died over the weekend aged 16. She played a big role in changing the fortunes of the sanctuary where she lived - Pench Tiger Reserve in the central state of Madhya Pradesh.
So named because of the radio collar she wore, she gave birth to 29 cubs in eight litters over her lifetime.Collarwali died on Saturday evening due to complications caused by old age. Collarwali was born in 2005 as T-15 - her mother, known as "badi mata" or "big mother" was also a famous tigress. Her father's name was T-1.
Later, she was called Collarwali - the one with a collar - when she became the first tigress in the park to be fitted with a radio collar, which allowed her to be studied for some years.
Then there were her 29 cubs, of which 25 survived - a record in India, and possibly the world.
Her first three cubs died of pneumonia in 2008 but she soon delighted experts by producing litter after litter at relatively short intervals - including a "bumper" one of five cubs in 2010, a rare feat according to naturalists.