5,036 feral pigs removed from Santa Cruz Island; fox population rebounded
A conservation project on Santa Cruz Island successfully restored the native fox population by removing over 5,000 feral pigs. The removal of the pigs eliminated the food source that had attracted invasive golden eagles, which were preying on the endangered foxes.
Why it matters
This case study demonstrates the complex, interconnected nature of island ecosystems and the effectiveness of targeted invasive species management in preventing extinction.
An ambitious conservation project off the coast of California has helped save the endangered Santa Cruz Island fox from near extinction. The rescue effort involved removing 5,036 feral pigs, allowing the native island fox (Urocyon littoralis santacruzae) population to recover from fewer than 100 animals to more than 1,300 across the 96-square-mile island. According to historical records and ecological recovery reports from the National Park Service and The Nature Conservancy, the crisis began after domestic pigs brought to Santa Cruz Island in the 1850s escaped and formed a large wild population.Unintended food source brought a new predatorFor decades, the feral pig population grew rapidly across Santa Cruz Island. The pigs damaged native vegetation and produced a steady supply of piglets throughout the year. This large food supply attracted golden eagles (Aquila chrysaetos) from mainland California.
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