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

A female casque-headed iguana at Exotic Zoo in Telford gave birth to eight genetically identical hatchlings through parthenogenesis, a rare natural reproductive process, zoo director said.

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