Abstract:

We have installed artificial nests of several types to aid the nesting of Red-footed Falcons, Kestrels and Long-eared Owls in the Dél-Alföld region, between 1989 and 1999. The majority of the installations were in three protected regions of 'puszta' (Pitvaros, Cserebökény and Baks) and a pasture near Hódmezővásárhely. The number of birds breeding in the areas gradually increased in reaction to the installations. The three species occupied 29-52% of the nest boxes, although there were yearly fluctuations. The average numbers of eggs and nestlings of the three species were also examined throughout the 10 years. Based on the remnants of food found in the nests we could also analyse the prey spectra. Artificial nest boxes are usually successful in increasing raptor density, if undisturbed breeding grounds (an alley, a patch of woods, etc.) and an appropriate food base can be found.