She has been locked in her cramped and dirty cage and has never set foot outside the concrete floor.
There are also leaking roofs and dirty gutters.
The zoo visitor who filmed the footage said: ”I felt very sorry for the gorilla. She looked so sad. It’s terrible because there’s no hope for her anymore.
”She should be in the wild not in a zoo. At least once in her life she should feel the earth on her feet.”
Bua Noi was bought as a baby from Germany for three million baht in 1992. She has stayed in her cage ever since.
In 2015, animal rights activists handed in a petition, which called for Bua Noi’s release and the zoo’s closure.
Speaking at the time, petition organiser Sinjira Apaitan said: “I don’t think animals should be locked up in such unnatural habitats. I hope to help all other animals being held captive in this high-rise zoo as well.”
They ordered the owners to remove the gorilla and other large animals including tigers, leopards, monkeys and apes.
Despite calls at that time for Bua Noi to be released, she stayed inside the zoo – with the owners signing an agreement to take better care of her.
The owner, Kanit Sermsirimongkol and the director of Pata Zoo, said that there is ”no problem” with all animals living in the rooftop zoo and that Bua Noi’s sad look is just her ”natural facial expression”.
He said: ”Before opening, we consulted zoologists and veterinarians and only selected animals that were suitable for the zoo. And they have been treated well.
”The criticism doesn’t concern me because we know her best. Those people saw the picture of her on the internet and assume she’s depressed. But that’s how she looks just like humans – some have a sad face and some have a happy face.
”We have been taking care of Bua Noi like our own daughter. I know that we will have to find her a suitable new home one day but it’s not good idea to immediately release her back into the wild withoutteaching her how to survive on her own.”