Californias newest invaders are beautiful swans. Should hunters kill them?

California's mute swan population surged from approximately 1,150 in 2022 to an alarming estimate of over 12,000 this spring, alarming wetland biologists who recognize the significant ecological threat these invasive birds pose. Mute swans, originally from Europe and Asia, aggressively compete for resources and have been known to harm smaller animals and native bird colonies. In response, Assembly Bill 764 aims to permit hunters and landowners to cull the swans over the next five years, mirroring previous efforts against other invasive species like nutria, which have cost the state $13 million since 2018. Mark Hennelly from the California Waterfowl Association emphasized the need for proactive measures to manage the swan population before it becomes unmanageable. The bill passed the Assembly unanimously and now awaits Senate consideration.

Surprisingly, no groups have opposed the measure so far, though opposition may arise as the issue gains more attention. The mute swan problem highlights the broader challenges California faces in managing invasive species and protecting its wetlands. Effective management is crucial to maintaining the health of the Sacramento-San Joaquin Delta, the largest estuary on the West Coast.