Counting the Loggerhead nests in Zakynthos - the work of an army of ants
For the past 41+ years, ARCHELON has been counting annually nests laid by loggerhead turtles on the island of Zakynthos, one of most important nesting areas in the Mediterranean. It is a very meticulous job as it is carried out every day, at the same time of year along the same beaches applying the same standardized methods. Trained volunteers coming from all over the world take on the job, braving the harsh working hours, the extreme heat and other adverse conditions. ARCHELON’s nest count program in Zakynthos is the oldest in the Mediterranean and one of the oldest in the world. Such long-term projects provide important information for the conservation status of sea turtle populations, and this is the reason that Zakynthos has been characterized as an index-area for IUCN.
Since the establishment of the National Marine Park of Zakynthos, ARCHELON cooperates closely with the Park’s Management Agency, now operating under the nationwide Natural Environment and Climate Change Agency (NECCA), providing every year data collected so at to facilitate the Park’s primary task which is the management of the nesting beaches.
In 2024, we counted a record number of nests since the start of our project 41 years ago. Nevertheless, the long-term trend shows that the number of nests is more or less stable as we have observed intense annual variations over the years (see figure). These variations are due to fluctuations on the environmental conditions at the foraging areas of turtles. Favourable conditions make more food available making the turtles to breed more frequently. So, some years we count more nests - however this does not automatically indicate an increase in the total number of breeding females.
However, the current record in the number of turtle nests laid on the island during 2024 also carries a feeling of optimism that if this trend continues, it may lead to the recovery of the Zakynthos sea turtle population.
Transforming Rethymno: Sustainable tourism opportunities with the sea turtle as ambassador
Successful wrap up of Amvrakikos project for 2024 marking two decades of dedicated work
RECENT NEWS
- OUR NEWS17/04/2026
How a sea turtle illuminated the unknown paths of the Aegean
Helen Jane was not just another dead sea turtle found on the Greek coastline. For ARCHELON researchers, she was a living beacon of information
- OUR NEWS17/04/2026
Is it Really 1 in 1,000? New Science Challenges the Iconic Sea Turtle Statistic
For decades, one quote has defined the struggle of sea turtle conservation: 1 in 1,000. This statistical information suggests that for every thousand hatchlings that enter the sea, only one will survive the long journey to adulthood.
- OUR NEWS10/04/2026
ARCHELON takes part in Chania's “Move It Now” initiative
Through educational activities, games and discussions, students had the opportunity to understand that every "green" choice in our daily lives is a direct help to the environment.
- OUR NEWS09/04/2026
Coming together for sustainable tourism in Chania
Looking towards the upcoming nesting season, the tourism community of Chania gathered at the city’s Town Hall.
- OUR NEWS08/04/2026
The Return of the “Giant”: Everest Swims Again in Greek Seas After Two Years of Rehabilitation
The story of 'Everest' began in May 2024 in Preveza, when the sea turtle was found with a severe, intentional head injury. Upon arrival at the Rescue Centre, its condition was critical: malnourished, weighing just 81 kg, and suffering from serious buoyancy problems that made survival in the sea impossible.
- OUR NEWS07/04/2026
Through the dust: Rethymno looks for a sustainable future with the sea turtles
Neither the African dust nor the sandstorm of last Wednesday stood in the way of ARCHELON's event at the Rethymno City Hall!
- OUR NEWS02/04/2026
Volunteering Has Never Been More Attractive: Special offers for 2026
ARCHELON invites you to join its field projects and actively protect sea turtles and their habitats.
- OUR NEWS09/03/2026
The Annual General Assembly of the Association
ARCHELON's Members were invited to attend the Annual General Assembly on Saturday, February 28 at the Sea Turtle Rescue Centre.
- OUR NEWS03/03/2026
Join us for the Online Presentation of 2025 Results!
On Monday, March 23rd, we have the chance to meet again online and share what we accomplished together in the past year.
- OUR NEWS03/03/2026
A Digital Adventure for Your Class with ARCHELON
Through a live connection with the Centre, students learn about the turtles’ rescue stories and discover how everyday human activities can negatively impact marine ecosystems.
- OUR NEWS24/02/2026
32 Years Returning to Nest: A Record Reproductive Lifespan for the Loggerhead Sea Turtle in Kyparissia Bay
When we analyzed the turtles’ codes, we realized that this was a turtle that had been tagged for the first time in the area 32 years ago! Specifically, turtle P4849 was tagged on July 7, 1993 and today is the turtle with the longest documented reproductive lifespan in Kyparissia Bay!
- OUR NEWS18/02/2026
"The Mediterranean We Protect" ARCHELON Presented the 2025 Results and the New LIFE MareNatura Exhibition
The presentation of our Accounts for 2025 was held with great success on Saturday, February 14th in Glyfada, honoring the people who are on the front lines for the protection of the Mediterranean.
- OUR NEWS11/02/2026
ARCHELON in the Lakonikos Bay: Nature, Research, Volunteering
The year 2025 was a milestone: a total of 1,253 nests were recorded and protected, while 7 female turtles were equipped with satellite transmitters, sending valuable data about their journeys across the Mediterranean.
- OUR NEWS23/01/2026
A turtle we treated 10 years ago was found in Spain!
“Castello” is a male Loggerhead turtle that was treated at our Rescue Centre in 2015. In 2025 he was found again at a Rescue Centre in Spain!
- OUR NEWS02/01/2026
Against All Odds: A Story of Marine Resilience from Amvrakikos Gulf
One turtle has been surviving for at least six years without a lower jaw!