A comparative study of the breeding ecology of the house sparrow Passerdomesticus L Timing of breeding and breeding success

OpenAlex İngilizce

Breeding activity of the house sparrow (Passer domesticus) occurred between March and August; up to four successful clutches per pair were found in each breeding season. Timing of breeding activities and breeding patterns were compared for the years 2001 to 2003. Of the 656, 760, and 600 (total 2016) eggs laid in the three years, 334 (50.91%), 426 (56.05%), and 362 (60.33%) (total 55.65%) hatched; 224, 276, and 209 (total 709) nestlings fledged, giving a breeding success in terms of eggs laid of 34.2%, 36.1%, and 34.8% (total 35.2%); 67.1%, 64.8%, and 57.6% (63.2%), respectively, in terms of the eggs hatched. The mean number of fledglings per clutch was 2.70 ± 0.13, 2.42 ± 0.09, and 2.36 ± 0.11 (2.49 ± 0.06). The mean nestling weight at hatching and before fledgling (day 15) was 1.81 g ± 0.40 (n = 59) and 21.10 g ± 0.30 (n = 94), respectively. These data provide a base against which future population changes can be monitored.