ONE of two monkeys that escaped from Belfast Zoo remained on the run last night - 36 hours after he first fled his enclosure.
The zoo plans to review security at the enclosure following the second break-out in two years.
Zoo staff have asked anyone who has spotted the lion-tailed macaque, Zoid, to contact them immediately.
His comrade, Rose, was found yesterday afternoon following a search operation involving the zoo vet, keepers and the Northern Ireland Fire and Rescue Service.
She was tracked down to what a zoo spokeswoman termed as a "nearby location", and tranquilised by the zoo vet before being returned to her enclosure.
The macaques are native to India. However, a zoo spokeswoman said they are "fairly hardy and the cold should not affect them".
Rose is nine years old and Zoid is seven years old.