As Cabo Verde's fairytale journey continues at the FIFA World Cup, the tiny island just pulled off one of nature’s greatest comeback stories

While Cabo Verde remains to capture global attention with its remarkable football journey on the international stage, the island nation is celebrating another extraordinary achievement, this time in the natural world. Scientists have disclosed that Boa Vista, one of Cabo Verde's significant islands, has witnessed one of the most dramatic wildlife recoveries ever recorded. A new long-term study published in Biological Conservation found that nesting activity by loggerhead sea turtles (Caretta caretta) increased 80-fold between 1998 and 2024, mirroring decades of dedicated conservation work by researchers, local communities, and environmental organizations.

Night patrols noticed something unusual years before the data confirmed it

The remarkable recovery initially became apparent to conservation teams long before scientists finished their analysis.

Beginning in 2018, night patrol volunteers working along Boa Vista's beaches began encountering far more nesting loggerhead turtles than they had become accustomed to seeing. Patrols that earlier recorded only five to ten nesting females during a shift suddenly documented 20 to 30 turtles, and by 2021, some teams observed 30 to 40 nesting females in a single night.


Those surprising observations have currently been supported by years of scientific monitoring, confirming that the increase features one of the most major loggerhead turtle recoveries ever recorded.

A recovery decades in the making

Unlike many wildlife species, loggerhead turtles cannot rebound immediately. They have exceptionally long life spans, travel across vast ocean distances, and females often need many decades before returning to the beaches where they hatched to lay eggs of their own. Because of that lengthy life cycle, today's nesting surge represents conservation actions initiated many years ago.

As per the marine turtle biologist Jeanette Wynecken, who was not involved in the research, turtles that hatched during the early years of the monitoring program would likely have started returning to nest only around 2013 or 2014.

"Since sea turtles age slowly and mature late, an analysis over such an extended time period is essential to understand the effect that conservation has on turtle populations," Wynecken told Mongabay. Her observation emphasizes a significant reality: successful sea turtle conservation must be measured over generations rather than years.

Boa Vista now rivals the world's biggest loggerhead nesting sites

The study found that Boa Vista is no longer simply recovering, it has become one of the planet's most significant nesting locations for loggerhead turtles. Scientists compared the island with renowned nesting regions in Florida and Oman, where peak nesting densities reach roughly 965 nests per mile.

On Boa Vista, however, the island's three largest nesting beaches surpassed 35,000 nests per mile during 2021, showcasing an exceptionally dense concentration of breeding turtles. Researchers highlight that this does not mean every beach in Cabo Verde experiences such high nesting activity. Instead, the findings underline Boa Vista's significance as a critical breeding region for the North-East Atlantic loggerhead population.

Years of careful fieldwork built the evidence

The findings are based on a monitoring programme developed by Cabo Verde Natura 2000 (CVN2). Since 1998, staff members and volunteers have conducted regular patrols throughout each nesting season. Beginning every June, teams walk the beaches at night looking for nesting females, documenting each nest and counting eggs before carefully removing visible tracks to prevent duplicate observations.

Later in the season, normally during October, researchers return to examine hatching success by evaluating each nest. The demanding work often happens under challenging conditions, including darkness, coastal winds, and humid weather, but these consistent observations have generated one of the world's most valuable long-term sea turtle conservation datasets.

Conservation measures transformed the population

Scientists credit the population increase to a combination of complementary conservation measures rather than any single intervention. These included protecting nesting habitat, reducing poaching, relocating nests threatened by flooding or predators, operating hatcheries, and encouraging greater involvement from surrounding communities.

Study co-author Carlos Angulo-Preckler, a marine researcher at King Abdullah University of Science and Technology, highlighted the broader importance of the findings.

"This study is a good example of how long-term conservation datasets from NGOs can be transformed into scientific evidence that supports both local conservation and the global understanding of sea turtle recovery."

Much of that success has relied upon local participation. Most members of CVN2 are Cape Verdean, while turtle-based ecotourism has helped illustrate that living turtles provide lasting ecological and economic value for island communities.

Threats have not disappeared

Although Boa Vista's recovery offers hope, loggerhead turtles remain under pressure across much of their range. The species remains listed as Vulnerable on the International Union for Conservation of Nature (IUCN) Red List, and global populations have declined by around 47 percent over the past three generations. Scientists caution that accidental capture in fishing gear, coastal development, marine plastic pollution, illegal harvesting, and habitat loss remains to threaten turtle populations across several regions.

Success creates unexpected challenges

Ironically, increasing turtle numbers have introduced fresh conservation challenges. As more females select the same beaches for nesting, available space becomes limited. Researchers have observed that turtles occasionally excavate existing nests while digging new ones, accidentally destroying previously laid eggs. Concentrating thousands of nests within relatively small stretches of coastline also leaves the population more vulnerable to storms, erosion, coastal construction, or localized poaching.

Source: ECONEWS (ECOticias.com)

FAQs:

Q1. Why is the loggerhead turtle recovery important?

It demonstrates that long-term conservation efforts can successfully rebuild wildlife populations. The recovery also strengthens biodiversity and supports healthier coastal ecosystems.

Q2. Where did this remarkable turtle recovery occur?

The recovery was recorded on Boa Vista Island in Cabo Verde. The island is now one of the world's most important nesting areas for Atlantic loggerhead turtles.