Ornis Hungarica. vol.17-18. (2009) p.1-11.
Breeding ecology and population decline of the crested lark Galerida cristata in Warsaw, Poland
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).