Fieldfare in conditions of transformed landscapes of Kharkiv region. - A.B.
Chaplygina, I.A. Krivitsky. - Berkut. 5 (2). 1996. P. 158-162.
South border of the Fieldfare's breeding range advances to the south. The species has a propensity for anthropogenous landscapes. The expansion goes from very transformed (urbanic) landscapes to little transformed natural habitats. Fieldfares nest mainly in colonies from 4 to 25 pairs (on average 12,0±1,7, CV = 61,7 %). A colony has the area 0,5-1,0 ha. Nest placing in crown is determined by the architectonics of a tree, masking conditions, times of the start of generative period, degree of landscape transformation. 20 tree species are used (Table 1, 2). In towns fieldfares nest significant higher. 4 types of nest placing are defined. Nest building continues 4-5 days. Weight of ready nests fluctuates from 167 to 467 g (on average is 265,4 g, n = 45). Eggs are laid in the second decade of April. Full clutch contains 5-6 eggs (5,4±0,12, CV = 15,9 %, n = 50). Brooding continues on average 11,4±0,05 days. Hatchlings mass appear early in May. Fledglings leave nests since the end of the first decade of May. 10 % of birds start second nesting. Duration of the breeding period is 86 days. [Russian].
Key words: Fieldfare, Turdus pilaris, Kharkiv region, ecology, breeding, habitat, nest, egg.