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Iguana gives birth without mating in 'one of rarest events in animal kingdom'

The rare natural phenomenon of parthenogenesis allowed the female iguana at Telford's Exotic Zoo to produce eight genetically identical female hatchlings, highlighting conservation and scientific interest.

  • In the last week of August, a female casque-headed iguana at Exotic Zoo in Telford, England, produced eight hatchlings, about 30 miles northwest of Birmingham.
  • Zoo staff say the event was caused by parthenogenesis, where unfertilised eggs develop into embryos, a process rare among reptile species worldwide.
  • The zoo hopes to put the hatchlings on public display in the coming weeks, offering visitors a chance to learn about genetics, evolution and conservation.
  • Similar asexual births have been recorded in other species, including a shark in 2023 and a stingray last year; this matters as casque-headed iguanas face habitat loss and illegal poaching.
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A female casque-headed iguana at Telford Exotic Zoo, England, surprised keepers after hatching eight offspring without ever meeting a male.

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Shropshire Live broke the news on Tuesday, September 9, 2025.
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