For a story that began in the 1970s, the ending is finally starting to feel good.

A new assessment from the U.S. National Oceanic and Atmospheric Administration (NOAA), highlighted in Earth Day 2026 coverage this week, finds that most species of sea turtle are rebounding worldwide. Green sea turtles are up the most; loggerheads, olive ridleys, and hawksbills are showing regional gains too. After half a century of protected-species status in the U.S. and a patchwork of international agreements, the numbers are finally moving in the right direction.

What changed

Sea turtles are famously patient patients. They take 20 to 30 years to reach breeding age, which means conservation efforts put in place when bell-bottoms were cool are only now showing up in the nesting counts. What did those efforts actually look like?

  • Endangered Species Act protections for all sea turtles in U.S. waters, signed in 1973, which banned targeted harvest and required turtle-safe fishing gear.
  • Turtle excluder devices (TEDs) — essentially trapdoors in shrimp-trawl nets that let turtles escape. Shrimpers hated them at first; they now save tens of thousands of turtles a year.
  • Nesting-beach patrols and hatchery programs across Mexico, Costa Rica, Australia, Greece, Brazil, and dozens of other countries, relocating eggs away from poachers and rising tides.
  • A global ban on international trade in sea turtle products under the CITES treaty, which effectively killed the once-massive hawksbill shell market.

None of these were overnight fixes. Together, over decades, they added up.

Green turtles lead the way

Green sea turtles (Chelonia mydas) are the headline success story. In the 1970s and 1980s, nesting colonies were collapsing across the Caribbean, Pacific, and Indian Oceans. Today, nesting counts on many of those same beaches are at or near historical highs. Hawaii's honu are now a common sight on main-island beaches; Florida's green turtle nesting has climbed from a few hundred nests a year in the 1980s to tens of thousands in recent seasons.

Loggerheads and Kemp's ridleys are more mixed — Kemp's ridleys in particular are still well below their mid-20th century numbers — but both species are trending up from the lows of the 1990s. Leatherbacks, which range farther into cold water than any other reptile on Earth, remain the most fragile of the group and are the one species still in clear decline in key populations.

Why it matters beyond the turtles

Sea turtles are what ecologists call engineers of their ecosystems. Green turtles graze seagrass meadows, keeping them productive in the same way grazing bison maintained prairie. Hawksbills prune sponges off coral reefs, freeing up space for reef-building corals. Leatherbacks eat jellyfish by the ton, helping keep jellyfish blooms — which can decimate fisheries — in check.

When turtles come back, the systems around them come back too. Seagrass meadows are stronger carbon sinks. Reefs handle heat stress slightly better. Beaches get a natural dose of nutrients from eggs and hatchlings that don't survive. That's why conservation biologists pay so much attention to these numbers: turtles are both a species worth saving and a proxy for ocean health.

A playbook that works

The Earth Day 2026 wins list is longer than just turtles — sea otters are stable on the U.S. West Coast, humpback whales are off the endangered list in most populations, and giant pandas are no longer classified as endangered. The common thread is unglamorous: steady, long-term legal protection, international coordination, and a lot of volunteer hours on beaches.

The lesson is one conservation biologists have been trying to get across for years. Recoveries take longer than careers, longer than news cycles, and longer than political terms. But when you keep the pressure on long enough, populations that looked doomed come back. Sea turtles — 100-million-year-old survivors of mass extinctions — are the latest reminder.