NSW zoo welcomes birth of baby black rhino

A critically endangered black rhino calf born at Taronga Western Plains Zoo in Dubbo has already captured the hearts of zoo keepers.

The 30-kilogram female bub, who is yet to be named, was born on April 11 to first-time mum Kufara.

"Both mother and calf are doing well," zookeeper Linda Matthews said in a statement on Friday.

"Kufara is very cautious and protective of her calf, which is a natural behaviour for a first-time mother."

Ms Matthews said Kufara was attentive and ensuring the calf suckled frequently.

Mother and daughter will make their first public appearance in late June after strengthening their bond out of the spotlight.

The baby rhino is the fourth calf born in the past 12 years under the zoo's critically endangered species breeding program.

Only 4200 black rhinos remain in the wild with poaching a major threat to their survival.