The close bond that has formed between a two-year-old chimpanzee called Do Do and a two-month-old tiger cub called Aorn shows off a motherly instinct which can rival even the most maternal of mankind.
Completely at ease in each other's company, the ape's motherly instincts take over as she attentively bottle feeds the baby tiger. Aorn gratefully laps up the milk as Do Do tenderly holds the tiger in her arms.
At one point, Do Do puts the bottle in her own mouth - almost mimicking the actions of a human mother checking to see if the milk is suitable for her offspring to consume.
For some unexplained reason Do Do is wearing a pair of denim shorts - perhaps to protect her thighs from Aorn's claws.
They were photographed at Samut Prakan Crocodile Farm and Zoo on the outskirts of Bangkok, Thailand.