A visitor at Sydney's Taronga Zoo noticed the blood on gorilla Frala's brown coat.
Within an hour, a small army of vets and keepers had descended on the gorilla enclosure to discover that Frala had given birth to a baby gorilla boy.
Frala's new son, who joins his four-year-old brother Fataki at the zoo, will feed on breast milk alone for around eight months before being introduced to vegetarian solids the rest of his family enjoys.
(via)