Thousands of Carinthian tadpoles return as blue frogs after breeding in Vienna

Thousands of tadpoles from Carinthia began their metamorphosis into marsh frogs at Vienna Zoo.

Published 10sem1 source

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The fact

Males turned blue during the breeding season before being reintroduced to their native region.

The operation aimed to support the local population of this species.

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Auto-synthesis from 1 media source · identified on July 6, 2026