Down but not out. The Grand Cayman blue iguana came to the verge of extinction with just 25 remaining in the wild in 2002, but has clawed its way back. The world's largest iguana has benefited from an aggressive captive breeding program aimed at reintroducing into its natural habitat. Once a year, females lay up to 22 eggs in underground burrows. Though their young still face predation by feral animals, road mortality and habitat loss, they represent a second chance and remarkable comeback for the species.
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