Zonkey, rare zebra-donkey mix, born in Mexico

A zoo in northern Mexico has a new, odd addition -- a zonkey.

The rare cross between a zebra and a donkey, named Khumba was born four days ago.

His mom is a zebra named Rayas. His dad is a dwarf albino donkey named Ignacio who lives at a nearby farm. Zoo keepers say mom used to visit Ignacio every afternoon.

The zoo says it's a rare birth because zebra and donkey chromosomes are not usually compatible.