Nestled within a mosaic of pine woodland, carob scrub, lentiscus, and open habitats, Thkio Mosfilies, our nature reserve in Frenaros, has quietly become an important refuge for birds navigating one of the world’s most demanding journeys, migration. Since Autumn 2021, our bird ringing efforts at the site have begun to reveal just how vital this landscape is, not only for resident species, but also for migratory birds that depend on safe stopover and breeding habitats.
Thkio Mosfilies was established as BirdLife Cyprus’ first nature reserve and outdoor learning space, with the aim of creating and maintaining a rich, diverse habitat that supports birds and other wildlife, while also connecting people, especially local communities and schools, with nature through education.
In addition to habitat creation, conservation, and outdoor experiential learning, we also carry out systematic bird ringing at the site to better understand how birds use this space throughout the year. By conducting at least one standardized ringing session each season, autumn, winter, and spring, we are building a detailed picture of species diversity, seasonal presence, and long-term changes in bird communities. Our nets are placed in consistent locations across the reserve, carefully chosen to reflect its varied habitats. This standardised approach allows us to monitor trends over time and assess how habitat management practices influence bird populations and preferences.
In just a few years, the results have been remarkable. Across 18 ringing sessions, we have recorded 338 birds from 29 different species. These numbers alone highlight the ecological richness of Thkio Mosfilies, but it is the recaptures, the birds that return, that tell the most compelling story.
Recaptures provide a rare window into the lives of individual birds. They reveal patterns of survival, site fidelity, and migration that would otherwise remain invisible. At Thkio Mosfilies, many recaptures involve resident species such as Sardinian Warblers and Great Tits, confirming that the reserve offers stable, year-round habitat. However, it is the stories of migratory birds that truly highlight the reserve’s wider importance.
One particularly striking example is a Common Chiffchaff first ringed at the site in February 2022. This tiny migratory bird, weighing no more than 10 grams, facing countless threats along its migratory route, was recaptured again in February 2023, and then once more in February 2026. This makes the bird at least six years old, an impressive lifespan for such a small species. Its repeated return to Thkio Mosfilies suggests that the reserve provides reliable wintering habitat, a place it “knows”, trusts and considers home.
Equally compelling is the case of an Eastern Olivaceous Warbler, recaptured over three consecutive spring seasons (2023, 2024, and 2025). Each year, the bird showed signs of breeding at the site, demonstrating strong site fidelity. This tells us that Thkio Mosfilies is not just a stopover point, but also a breeding ground for migratory species, a role of critical importance in their life cycle.
These individual stories reflect a much larger truth. Migration is an inherently risky endeavour, requiring birds to travel vast distances across continents. Along the way, they depend on a network of safe habitats where they can rest, refuel, and, in some cases, breed. The loss or degradation of even a single site can have far-reaching consequences.
Thkio Mosfilies stands as one of these essential refuges. Through careful habitat management and ongoing monitoring, the reserve provides a sanctuary where birds can thrive amid increasing environmental pressures, while also offering a space for people to connect with birds and the natural world.
Every recaptured bird is a testament to survival, resilience, and the value of conservation. Together, they tell a powerful story: that well-managed reserves, even a small one like our Thkio Mosfilies, can play an important role in supporting bird populations along migratory routes.
As our work continues, each ringing session adds another piece to the puzzle, deepening our understanding and strengthening the case for preserving safe havens like this one for generations of birds to come.
Our Thkio Mosfilies nature reserve would not have been possible without the continuous generous support of NABU, our BirdLife partner in Germany. We also thank BirdLife International and BirdLife Switzerland for their support, as well as Bird Focus for making our ringing efforts possible.
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