Twin giant panda cubs born at Madrid Zoo(1/1)

This handout picture released by Madrid Zoo shows twin giant panda cubs in an incubator on September 7, 2021, a day after their birth at the zoological garden in Madrid. (Photo/Agencies)

A giant panda gave birth to twin cubs on September 6, 2021 at Madrid zoo in what officials hailed was a "great contribution" to the conservation of the vulnerable species.

Madrid's Zoo Aquarium said its female panda -- Hua Zui Ba -- gave birth to the first cub at around 8:30 am after more than four hours of labour, while the second followed just after midday.