Sea Turtle Light Pollution and Nesting Success

Artificial light pollution disrupts sea turtle nesting and hatchling orientation, threatening welfare and conservation.

Key Facts

Female sea turtles return to their birth beaches to nest, guided partly by natural light cues
Artificial lighting on nesting beaches deters nesting females and causes nest site selection errors
Hatchlings orient toward the brightest light — on natural beaches, the sea — but artificial lights redirect them inland
Disoriented hatchlings die of dehydration, vehicle strikes, and predation before reaching the ocean
Turtle-friendly lighting using amber wavelengths visible to humans but not disorienting to turtles is available

Welfare Considerations

Light pollution is one of the most tractable threats to sea turtle welfare because it is both preventable and reversible. Female turtles deterred from natural nesting beaches by artificial light either deposit eggs in suboptimal sites with lower hatching success or abort nesting attempts entirely. Hatchlings disoriented by artificial light walk inland rather than toward the sea, facing death from dehydration, exhaustion, and predation. Each disoriented hatchling represents a preventable welfare harm. Turtle-friendly lighting ordinances, beach lighting management programs, and resident education can eliminate this threat at relatively low cost.

What You Can Do

Turn off or shield coastal lights during sea turtle nesting season (May-October in Florida)
Advocate for turtle-friendly lighting ordinances in your coastal municipality
Use amber LED lights in coastal properties that cannot be darkened completely
Participate in local sea turtle lighting compliance programs
Donate to sea turtle nesting beach protection and lighting ordinance advocacy organizations