Loggerhead turtle nesting brings new pressures to western Mediterranean beaches
The story at a glance
Loggerhead turtles are nesting more often in parts of the western Mediterranean, including on beaches used by tourists. Research finds that the rise is real, although improved monitoring and reporting may account for some of the increase in recorded nests. 123
Conservation groups and beach authorities are monitoring nests and introducing local protections. Artificial lighting, beach maintenance and coastal development remain risks, while it is not yet clear whether the new nesting sites will support lasting breeding populations. 125
What you need to know
- A study compiling records from Spain, France, Italy and Tunisia found recorded nests rose from one to three a year in 2013 to 84 in 2020. Its authors concluded that nesting activity had genuinely increased, while noting that greater public awareness could also have raised the number of nests reported. 2
- The increase is not explained simply by locally born turtles returning to nest. Genetic analysis of Spanish nests found the rise was associated with new colonising females, rather than mainly with daughters born in the region. 4
- Warmer sand conditions may be making more Spanish Mediterranean beaches suitable for incubation. Researchers have found that suitable temperatures have become more widespread in recent decades, but the extent to which warming explains the wider nesting expansion remains uncertain. 32
- The EU LIFE TURTLENEST project monitors nesting sites in Italy, France and Spain and works with local authorities and resorts. The European Climate, Infrastructure and Environment Executive Agency reported more than 700 nests in Italy in 2025, up from 443 in 2023 and 601 in 2024. 5
- Local responses include nest monitoring and lower-intensity promenade lighting in Ascea. A local requirement for low-impact lighting standards is due to apply to applicants for new beach-facility concessions from 2027, according to the Mongabay report. 1
Why this matters
New nesting activity overlaps with busy, developed coastlines, where lighting and beach operations can put nests and hatchlings at risk. Monitoring and practical beach management are therefore important, but the evidence supplied does not show whether current measures are reducing losses. 125
What happens next
Monitoring will help clarify how nesting patterns change and whether local protections are applied consistently. Longer-term evidence is needed to determine whether western Mediterranean sites produce returning females and persistently breeding populations. 2345
What we know
- Recorded loggerhead nesting has increased in parts of the western Mediterranean, though improved monitoring and public reporting may explain some of the rise in records. 123
- Spanish research found more beaches with sand temperatures suitable for incubation, while genetic analysis linked increased nesting there to new colonising females. 34
- Nesting sites overlap with heavily used coastlines, and reported risks include artificial lighting, beach maintenance and coastal development. Monitoring and some local protections are under way. 125
What we don't know
- The available evidence does not establish how much of the increase in recorded nests reflects actual expansion and how much results from improved monitoring and reporting. 23
- The contribution of warming to the expansion, including possible effects on juvenile growth or maturity, remains uncertain. 123
- It remains unresolved whether nesting will lead to self-sustaining populations, with uncertainties including offspring sex ratios, return nesting and risks to beach habitat. 234
Read the reporting
This WildNews briefing synthesises and summarises reporting from the sources below. WildNews did not produce the original reporting. Learn more about how we use AI
Was this story useful?
Your anonymous feedback helps us make future WildNews briefings more useful.
