An endangered gorilla has delighted her keepers by showing off her newborn son at Sydney's Taronga Zoo.

The baby was born on Saturday to endangered African western lowland gorillas, proud mum Frala and silverback father Kibabu.

He is the first gorilla offspring born at the zoo in two years.

Zoo visitors are starting to catch glimpses of the new arrival, who clings to his mother's belly as she moves around the zoo's gorilla habitat.