A hidden camera caught the moment a critically endangered tiger gave birth to a pair of cubs.
Chester Zoo welcomed the birth of the Sumatran tiger cub twins last month and said it represented a "significant step" in the conservation of the species. Sumatran tigers are listed as critically endangered, with less than 350 of the species living in the wild.
Staff at the zoo said the birth was a "real privilege" to see and said it will be "really exciting" to see the animals grow. The cubs have not yet been named or sexed but will be once they start to build confidence and travel outside, says the zoo.