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Female Iguana at UK Zoo Hatches Eight Without Mating in Rare Case of Parthenogenesis

The zoo says the offspring are all female clones produced through an asexual process in which unfertilised eggs develop into embryos.

Overview

  • The casque-headed iguana at Telford’s Exotic Zoo in Shropshire produced eight hatchlings over a week in late August despite never being housed with a male.
  • Zoo director Scott Adams called it “one of the rarest events in the animal kingdom” and said staff were stunned when fertile eggs were confirmed.
  • All eight babies are female and described by keepers as near-identical to their mother, known in some reports as Carol.
  • The hatchlings are in a climate- and humidity-controlled reptile nursery and are expected to go on public display in the coming weeks, with two slated for transfer to another zoo.
  • Parthenogenesis has been documented in only a handful of reptile species and has also been reported in other animals, including a 2023 epaulette shark case at Brookfield Zoo.