Conservation effort backfires as Tasmanian devils devastate penguin colonies

In 2012, wildlife officials relocated 28 Tasmanian devils to Maria Island off Tasmania's east coast as part of an ambitious insurance programme against facial tumour disease, a contagious and often fatal condition threatening the species' survival on the mainland. The relocation appeared successful initially, with the captive population thriving and expanding to approximately 90 individuals.

However, researchers conducting subsequent surveys discovered an unintended consequence of the conservation initiative: Maria Island's little penguin colonies had effectively vanished. The disappearance eliminated an estimated 3,000 breeding pairs of the small seabirds that had previously inhabited the island.

Experts attribute the penguin decline to predation by the introduced Tasmanian devils, whose carnivorous diet includes smaller wildlife. The incident highlights the complex ecological trade-offs inherent in conservation efforts, particularly on islands where introducing one species can devastate native populations.

The case has prompted wildlife managers across the region to reconsider translocation strategies for endangered animals and the potential impacts on existing ecosystems. Conservation authorities are now examining whether protective measures can be implemented to prevent similar outcomes in future species recovery programmes.