Escapee pregnancy test frogs colonised Wales for 50 years

4 days ago

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African clawed frogs were used for pregnancy tests before conventional methods were available.
The frogs were introduced to the UK and some escaped, establishing a population in south Wales.
The first reported sighting in Wales was in 1966, with a breeding population established by the 1970s.
Researchers kept the frogs' locations secret while studying them.
A severe winter in 2009-2010 likely caused the frogs' disappearance from Wales.
An eradication program was planned but not needed as the frogs vanished naturally.
No frogs have been found in Wales since 2010, suggesting they have been eradicated.

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