Ornis Hungarica. vol.17-18. (2009) p.1-11.
Breeding ecology and population decline of the crested lark Galerida cristata in Warsaw, Poland Cikk letöltése: [pdf] (447 Kb) Kivonat: The crested lark Galerida cristata inhabited almost exclusively open areas in the outskirts of new settlements of Warsaw in the years 1980-2006. The highest density of the species (0.11 pairs/km2) in the entire city (494 km2) was recorded in 1986, and locally (a plot of 2.6 km2) – 5.7 pairs/km2 in 1980. Breeding period lasted from April 12th (the first egg) to July 31st (the last fledgeling) with broods most intensively initiated in May. There were usually 4-5 eggs per brood, rarely 3 (mean 4.36±0.60 SD). The mean number of eggs in the first brood was 4.47±0.64 eggs, in the first repeated brood – 4.17±0.98 eggs and in the second brood – 4.09±0.70 eggs. Most pairs (71%) performed the second brood. Reproductive success of the population of 17 pairs studied in 1980 was 3.47 fledgelings leaving the nest per nesting pair (nearly 40% of broods were destroyed). | ||