“Nakal, the cub’s father, continues to spend time observing Tipah and the youngsters,” the team explained.
“He has been incredibly patient and calm during these introductions, and it has been wonderful to see the family dynamic develop.”
Howletts said there were fewer than 400 Sumatran tigers remaining in the wild.
According to Edinburgh Zoo, Sumatran tigers are critically endangered due to habitat destruction and poaching.
They are the smallest tiger subspecies and are native to Sumatra, one of Indonesia’s largest islands.
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