Scientific publications

The number of breeding Peregrine Falcons declined catastrophically in the 1950s and 1960s, reaching a minimum of about 30 pairs in the early 1970s. Since then the species has recovered considerably in the northern half of Finland but not in the south. Since the mid-1990s all previously known nest-site have been controlled at least in July to record nesting success, and new territories have been searched for actively. In total, 213 territories have been occupied at least once during the last five years. Over 90% of the Peregrine Falcons nest on the ground in extensive and wet peatlands. The average number of nestlings (over 30 days of age) per occupied territory has been 1.16 per occupied territory 1993–2005, and the respective figure per successful nest has been 2.33.