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The monitoring results show that 80% of the installed nest boxes are already occupied by birds. Of these, 96% are inhabited by kestrels and 4% by ravens. At this stage, no nest boxes occupied by Saker Falcons have been recorded, but the results clearly demonstrate the positive impact of this conservation activity.
In the lowland regions of the country, where many large and old trees near agricultural fields have been cut down, birds have increasingly fewer suitable nesting sites available. Installing nest boxes on high-voltage power lines in suitable habitats improves breeding conditions for a number of bird species. This measure is among the key conservation actions that have supported the recovery of the Saker Falcon in various parts of Europe.
At present, a significant portion of the occupied nest boxes are used by kestrels, one of the most effective natural regulators of vole populations and other agricultural rodents. In this way, the species also plays an important role in supporting agricultural production.
At the same time, inspections continue on more than 300 additional nest boxes installed under previous BSPB initiatives in different parts of the country. The results of this monitoring are expected in June. This activity is also part of the long-term partnership between BSPB and the Electricity System Operator (ESO), with whom a framework agreement has been signed for the protection of birds associated with power lines and the electricity transmission network.
The “Life for the Falcon” project (LIFE20 NAT/BG/1162) is coordinated by BSPB and implemented in cooperation with Green Balkans, the Union of Hunters and Anglers in Bulgaria, the Institute of Biodiversity and Ecosystem Research at the Bulgarian Academy of Sciences, the Romanian Ornithological Society, the Dutch Habitat Foundation, and the University of Tübingen, Germany. The project is co-funded by the EU LIFE Programme.