The study was carried out between 1996 and 1998 on a plot covered by mixed woodland near the southern boundary of the city of Warsaw. A total of 39 nests were investigated. The woodpeckers laid their eggs during the last ten days of April and at the beginning of May. The mean clutch size was 5.6 (n = 18). The number of young reared differed from season to season and was associated with the fledging date. More fledglings left nests with earlier broods. 81% of broods were successful, i.e. at least one young was reared. The duration of the breeding season — from the laying of the first egg to the fledging of the last chick — was 40–42 days.
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