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1

Song variability in Pied Flycatchers Ficedula hypoleuca: impact of the sympatry with Collared Flycatchers F. albicollis

100%
Vabishchevich A. P., Formozov N. A.
Acta Ornithologica
|
2010
|
tom 45
|
nr 2
2

Egg size variation in the Collared Flycatcher Ficedula albicollis in the Bialowieza Forest [NE Poland]

84%
Mitrus C., Rogala B.
Acta Ornithologica
|
2001
|
tom 36
|
nr 1
445 eggs of the Collared Flycatcher from 82 clutches were measured during three breeding seasons (1997-1999). The mean length was 17.82 ± 0.80 mm, breadth — 3.45 ± 0.37 mm and volume — 1.65± 0,14 cm³. Egg dimensions were positively correlated. No significant differences in egg sizes during the three seasons were found. This suggests that the environmental conditions in the Białowieża Forest during the study period did not change or had no influence on egg size. Laying sequence had no influence on egg dimensions; only egg length depended on clutch size. Some characteristics of the females did affect the size of eggs: heavier birds and those with longer tarsi laid larger eggs. Older females did not lay significantly larger eggs than younger females. In conclusion, egg size in the Collared Flycatcher from the Białowieża Forest appears to be influenced more by the characteristics of the female than by environmental conditions..
3

Temperature dependence of the breeding phenology of the Collared Flycatcher Ficedula albicollis in the Bialowieza Forest [NE Poland]

84%
Mitrus C.
Acta Ornithologica
|
2003
|
tom 38
|
nr 1
4

Absence of edge effects on nest predation in the Collared Flycatcher Ficedula albicollis in the primeval forest of Bialowieza National Park, NE Poland

67%
Stanski T., Walankiewicz W., Czeszczewik D.
Acta Ornithologica
|
2008
|
tom 43
|
nr 1
92-96
Nest predation is a major factor limiting breeding bird populations in primeval tree stands. Factors such as food limitation, availability of nesting sites or competition are not so important. Nest predation is usually more common along the edges of forests than in their interiors. The aim of this study was to determine how breeding losses in the secondary cavity-nester Collared Flycatcher Ficedula albicollis that bred in natural holes varied with distance from the forest edge in primeval stands of the Białowieża National Park (NE Poland). A comparison of the breeding losses along the edges and in the interiors revealed no statistical differences. The main nest predators were the forest species Apodemus flavicollis, Martes martes, and Dendrocopos major. It is better to keep forest tracts unfragmented, with a belt of bushes and thickets or woodland in an early successional stage along the edge. This would protect forest birds from predators living in open habitats.
5

Nest predation as a limiting factor to the breeding population size of the Collared Flycatcher Ficedula albicollis in the Bialowieza National Park [NE Poland]

67%
Walankiewicz W.
Acta Ornithologica
|
2002
|
tom 37
|
nr 2
6

Breeding losses in the Collared Flycatcher Ficedula albicollis caused by nest predators in the Bialowieza National Park [Poland]

67%
Walankiewicz W.
Acta Ornithologica
|
2002
|
tom 37
|
nr 1
7

Nestling food of European hole-nesting passerines: do we know enough to test the adaptive hypotheses on breeding seasons?

43%
Cholewa M., Wesolowski T.
Acta Ornithologica
|
2011
|
tom 46
|
nr 2
Hole-nesting passerines constitute a 'model' group for which importance of synchronisation between food availability — mainly caterpillars — and appearance of nestlings is commonly postulated. Is there an adequate set of data allowing one to prove this relationship? The recent climate change could lead to a mis-match between food peaks and nestlings' appearance. Do the data exist that show that the birds have switched to other food sources? We analyse data on nestling food of eleven European hole-nesting passerines (158 papers). The diet of some species is hardly known (< 100 broods observed), there are large gaps in geographical coverage (70% of data from five countries — Germany, Russia, Slovakia/Czech Republic, Poland and Great Britain) and most of studies do not meet the minimum requirement of representativeness (three seasons, > 20 broods/season), which limits their external validity. The majority of investigations were done decades ago, in different conditions and most probably they cannot be treated as representative for the current situation. There is no study in which the past (before warming) and current nestling diet in the same local population have been compared, so, direct empirical support for the 'mismatch' idea is rather weak. Knowledge of nestling diet and its variation is far from adequate and new, properly designed, studies are needed.
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