The Bali tiger was the first to go in the 1940s, followed by the Caspian in the 1970s.
Tigers are normally solitary, except for females with cubs.
Mating takes place all year round. Gestation is around 103 days and an average litter is two or three cubs. Cubs reach independence between 18 and 28 months. Females first breed after three years and usually reproduce every two years until they are about nine or 10 years old. The average breeding life of a female is 6.1 years.