Breeding success of the Red-throated Diver (Gavia stellata) in southern Finland

The Red-throated Diver is considered to be a threatened species. Since 1979 the breeding success of about 40 pairs in Häme, southern Finland has been monitored. Nests located on small islets produce more young than nests on shores. Reasons for unsuccessful nesting, including human disturbance, are considered. Our results seem to indicate that the Red-throated Diver population within our study area is on the increase rather than declining. The most probable reason for this is the good breeding success, i.e. 1.15 offspring per pair per year.