They are humans' closest relative, sharing a similar genetic make-up and displaying behaviour not unlike our own.
Now this little chimpanzee is showing off a motherly instinct to rival even the most maternal of mankind.
These adorable images reveal the close bond that has formed between a two-year-old chimpanzee called Do Do and a two-month-old tiger cub called Aorn.
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
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