A tourist was slammed after taking pictures of herself grabbing a tiger's testicles.

The woman was visiting the Tiger Kingdom zoo in Chiang Mai, northern Thailand, when she posed for selfies with the animal.

Shockingly, she reached between the big cat's legs then cupped its genitals while photographing the act on August 26.

Pictures of her stunt emerged online and the woman, Waraschaya, was criticised by angry locals who accused her of ''humiliating'' the tiger.

Similar zoos have faced controversy for allegedly sedating the powerful animals so tourists can pose for pictures with them.

One shocked viewer, Phorntip Siracha, wrote online: ''This is so rude. The tiger did not allow you to touch his privates. You have no right to do that.''

Another, Kaew, said: ''This is dangerous. If the tiger had reacted angrily it could have attacked you.''

Others said they felt sorry for the tiger for having its testicles exposed online.

Khun Waraschaya defended herself against the stunt and said she is an animal lover.

After hearing about the incident, the head of the zoo keepers, Pirom Cahntama, said on August 29 that the staff are trained to take care of their guests and the tigers.

He said that they are monitored carefully during close interactions where people take selfies to ensure that both are safe.

Pirom said: "We do not allow tourists to grab the tigers' testicles but they are allowed to touch any part of the animal's body as long as our specialists are present.

"From now on, we will make sure that no visitor will ever be able to touch this part of a tiger's body again.''

He added that the zoo specialists regularly examine the tigers' genitals and other parts of its body for health check.