Completely at ease in each other's company, they're the best of friends.
These adorable pictures show a two-year-old chimpanzee called Do Do feeding milk to Aorn, a two-month-old tiger cub.
The odd couple appear to be getting on tremendously as Do Do's motherly instincts take over.
Scroll down to see a video of the chimp and tiger cub playing together
Maternal instinct: A two-year-old chimpanzee called Do Do feeds milk to Aorn, a two-month-old tiger cub
Aorn gratefully laps up the milk as Do Do tenderly holds the tiger in her arms.
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.
The crocodile farm, used as a tourist attraction, houses some 80,000 crocodiles and is the largest in Thailand.
Bonding: The animals both live at Samut Prakan Crocodile Farm and Zoo on the outskirts of Bangkok
For some unexplained reason Do Do is wearing a pair of denim shorts - perhaps to protect her thighs from Aorn's claws
Its owners claim to hold the largest captive crocodile, measuring an astonishing six metres long and weighing 2,465lbs.
Regular crocodile shows are staged during which zookeepers place their heads inside the reptiles' mouths.
However, the farm doesn't just contain crocodiles.
As you'd expect from these pictures, monkeys and tigers also live there, alongside elephants, lions, horses and hippopotamuses.
Heat test: Do Do drinks some of the milk, perhaps to make sure the temperature is okay for the tiger cub
Aorn gratefully laps up the milk as Do Do tenderly holds the tiger in her arms
