Authorities at Stockholm's Skansen animal park announced the birth of two venomous baby Gila monsters on Wednesday, following a four-month incubation period.
Jonas Wahlström, the managing director at Skansen's aquarium, said animal keepers were proud to orchestrate the first birth of the species within Europe.
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"We're extremely happy to have finally succeeded in multiplying the numbers of Gila monsters after breeding them for years," he told The Local.
The Gila monster (Heloderma suspectum) is a native to the southern parts United States and northern parts of Mexico. It's a slow-moving, heavy lizard which grows up to 60 centimetres long. They're found in deserts and prey on small rodents and eggs.