Long-term monitoring
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In 2003, our team started a long-term monitoring program to estimate the number of roller breeding pairs and assess breeding success in the Castro Verde SPA, in southern Portugal. Regular visits to all known nests allowed to estimate other important breeding parameters, such as laying dates, hatching success and fledgling success, which are key to assess the health status of this population and the long-term responses to global changes.Â
The Roller breeding population is estimated at less than 100 pairs, with 80% of the population breeding in the Castro Verde SPA.
Rollers use both natural and artificial cavities to breed. In our study area, they mostly use nest boxes, clay pots and concrete cavities in walls provided in conservation projects targeting other species, such as the lesser kestrel. A few pairs still use natural holes in abandoned adobe buildings.
Rollers use both natural and artificial cavities to breed. In our study area, they mostly use nest boxes, clay pots and concrete cavities in walls provided in conservation projects targeting other species, such as the lesser kestrel. A few pairs still use natural holes in abandoned adobe buildings.
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