One for the family album: Mona Lisa bears an uncanny resemblance to Donkey from Shrek in this portrait picture
As far as rare breeds go, a zonkey is right up there with the most uncommon.
But one that's also a beloved family pet is almost unheard of.
Enter Mona Lisa, the zebra-donkey cross who has been brought up by her doting owner, Mara Baygulova, an internationally renowned opera singer and cellist from Glendale, California.
Mara took Mona Lisa in after rescuing her from a lonely and abused life on a ranch run by a horse trainer who had no idea she was so special.
Zonkeys - also known as Donkra or Zebroid - are extremely rare as zebras and donkeys rarely mate.
Devoted: Mara Baygulova hugs her pet zonkey, who she has brought up since rescuing her from a ranch 13 years ago
Researchers say that most Zonkeys live in zoos and most of them, outside South Africa, were created through artificial insemination.
Mona Lisa has the shape and the distinctive donkey ears - but has black and white ears, stripes on her legs and sports a striped, spiky zebra mane and tail.
Double take: Mona Lisa has the distinctive donkey ears, but sports black-and-white stripes on her legs and a spiky zebra mane and tail
Mara said: 'Mona Lisa is very smart just like a Zebra. In personality, she is 90 per cent zebra. She loves to run and gallop with horses. She's very competitive.'
She added: 'Her intelligence is that of a five year-old child. She retains information - she can see something done just once and then do it herself.
'For example, when we first got her she watched me unlock the gate on the corral. A few minutes later she did it on her own, using her lips like fingers.
'She also loves affection and is generous in giving affection, but she can get bratty if she doesn't get it!'
source :dailymail