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1

Die Adoption von jungen Wanderfalken Falco peregrinus beim Habicht Accipiter gentilis

100%
Trommer g.
Acta Ornithologica
|
1995
|
tom 30
|
nr 1
87-92
Methods of reintroducing Peregrine Falcons reared in captivity are divided into two kinds: 1) rearing in and flight from a nesting cage (artificial nest), and 2) intraspecific fostering or inter-specific cross-fostering with other species of raptors. The aim of the study described here was to transfer three Peregrine Falcon chicks to the nest of a Goshawk Accipiter gentilis and to compare the results with earlier experiments using this method. If the methodological assumptions defined in the study were complied with, all of the Peregrine chicks would be reared by the substitute parents - Goshawks - as their own young, and to the point where the young Peregrines were old enough to leave the nest area. This kind of reintroduction - of an ecological form which formerly nested in trees in forested ecosystems - was attempted successfully in 1994, and full photographic and cinematographic documentation of the effort was obtained.
2

Niezwykle polowanie jastrzebia Accipiter gentilis na perkoza dwuczubego Podiceps crisatus

84%
Wuczynski A.
Notatki Ornitologiczne
|
2000
|
tom 41
|
nr 4
328-329
3
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Wystepowanie myszolowa Buteo buteo i jastrzebia Accipiter gentilis w krajobrazie rolniczym w okolicach Lublina w roku 1994

84%
Miazga M., Roguszka A., Gustaw W., Siek R., Turski M.
Kulon
|
2000
|
tom 05
|
nr 2
183-191
4

Diet of the Goshawk Accipiter gentilis in Kampinoski National Park [Central Poland] in 1982-1993

84%
Olech B.
Acta Ornithologica
|
1997
|
tom 32
|
nr 2
191-200
Pluckings and prey remains of 1086 specimens of Goshawk prey colected during a whole year were examined. Prey items included almost all species of medium size birds (65 species) and mammals (6 species) occurring in the study area. Over 60% of the prey was captured in open areas, even though these amounted to less than 30% of total area. Diet composition and its diversity were changing between winter and the breeding season. Very small differences in the diet were found in comparison to data collected 36 years earlier from the same area. The main prey (over 50% both by number and by biomass) were the domestic pigeons, belonging to the bigest prey eaten by Goshawks completely and therefore the most efficient as food. High availability of this prey in Central Poland especially in early breeding period, confirmed by small difference between prey sizes of male and female, is a possible reason of high numbers of the Goshawk in this region.
5

Jastrzębiom na pohybel!

84%
Pudlis E.
Echa Leśne
|
2011
|
nr 06
6

Reintrodukcja sokola wedrownego [Falco peregrinus] metoda adopcji obcej w gniezdzie jastrzebia golebiarza [Accipiter gentilis]

84%
Wieland P.
Myślistwo Ptasze
|
1995
|
tom 01
31-32
7
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Rozpoznawanie gniazd jastrzębia Accipiter gentilis, myszołowa Buteo buteo, trzmielojada Pernis apivorus i orlika krzykliwego Clanga pomarina przy obserwacji z ziemi – doświadczenia z Kampinoskiego Parku Narodowego

84%
Olech B.
Kulon
|
2023
|
tom 28
8

Evaluation of the health status of goshawk chicks [Accipiter gentilis] nesting in Wroclaw vicinity

84%
Wieliczko A., Piasecki T., Dorrestein G. M., Adamski A., Mazurkiewicz M.
Bulletin of the Veterinary Institute in Puławy
|
2003
|
tom 47
|
nr 1
9

The breeding performance of the Common Buzzard Buteo buteo and Goshawk Accipiter gentilis in Central Poland

84%
Goszczynski J.
Acta Ornithologica
|
2001
|
tom 36
|
nr 2
Both the Buzzard and the Goshawk nested mainly in pines. The mean clutch size in the former was 2.8, in the latter 3.6 eggs per breeding pair. There were statistically significant differences in clutch sizes in the Buzzard in particular breeding seasons. The mean number of hatchlings was 2.3 in the Buzzard and 2.6 in the Goshawk. Brood losses were similar in both raptors —19% in the Goshawk and 24% in the Buzzard. The breeding success (the ratio of the number of fledglings to the clutch size) in the Buzzard was highest in clutches of 3 and 4 eggsy whereas in the Goshawk a similar level of success was achieved with smaller clutches (2 or 3 eggs). Only in the case of the Buzzard there were significant differences in clutch sizes and numbers of fledglings in the various years. In this species the mean number of fledglings was positively correlated with the rodent availability index in a given year. There was no such relationship between the abundance of prey items found in Goshawk nests and the number of fledglings. The correlation between the number of newly-fledged Buzzards and Goshawks in a given year could have been due to diet overlap between the two species.
10
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Dlugoterminowy monitoring ptakow szponiastych i kruka na terenie Nadlesnictwa Rogow

67%
Krauze D., Gryz J.
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
|
2007
|
tom 09
|
nr 2-3[16] cz.2
Rozpoczęty w latach 70. i kontynuowany do dnia dzisiejszego monitoring ptaków szponiastych na terenie Nadleśnictwa Rogów pozwala śledzić trendy liczebności wybranych gatunków. Ostatnia całościowa inwentaryzacja przeprowadzona w latach 2001-2003 ujawniła znaczne zmiany liczebności myszołowa, jastrzębia i kruka. O ile wzrost zagęszczenia myszołowa i kruka pozostaje w zgodzie z ogólnokrajowym trendem liczebności tych gatunków to znaczny spadek zagęszczenia jastrzębia budzi niepokój i skłania do poszukiwań środowiskowych i/lub antropogenicznych przyczyn tych zmian.
11

Jastrząb – postrach gołębi

67%
Zawadzka D., Zawadzki J.
Brać Łowiecka
|
2008
|
nr 08
12

Density and productivity of Common Buzzard Buteo buteo and Goshawk Accipiter gentilis populations in Rogow, Central Poland

67%
Goszczynski J.
Acta Ornithologica
|
1997
|
tom 32
|
nr 2
149-155
Density and productivity of Common Buzzard and Goshawks populations were studied over a period of 11 breeding seasons in Central Poland. The mean densities of Buzzards and Goshawks were 1.73 and 1.63 pairs/10 km² of the whole area (105km²), respectively. Both studied species showed little variation of density during the study period. Breeding pairs constituted over 90% of all pairs recorded in the study area. Productivity of the Common Buzzard was greater than that of the Goshawk. Mean number of fledglings per statistical, breeding and successful pair were 1.67,1.78 and 2.34 in Buzzard, and 1.96, 2.08 and 2.76 in Goshawks. Between-year variation in number of fledglings was high in Buzzard population and moderate in Goshawks. Buzzard productivity was related to changes in food composition of this species, whereas in Goshawks no relationship between productivity and diet was found.
13

Jastrząb Accipiter gentilis i sierpówka Streptopelia decaocto - ofiary kolizji z szybą domu jednorodzinnego w miejscowości Brynica

67%
Zysk-Gorczynska E.
Przegląd Przyrodniczy
|
2018
|
tom 29
|
nr 3
14

The Goshawk Accipiter gentilis in Wigry National Park [NE Poland] - numbers, breeding results, diet composition and prey selection

67%
Zawadzka D., Zawadzki J.
Acta Ornithologica
|
1998
|
tom 33
|
nr 3-4
181-190
The population of Goshawks in Wigry National Park was studied in the years 1989-97. The number of breeding pairs nesting was in the range 8-11, giving a density of 6.0-7.3 (mean 6.7) per 100 km², or 8.0-11.0 (mean 9.5) per 100 km² of forest area. 69% of broods were successful, mean clutch size was 3.1 and the production of young was at 2.7 per successful pair or 1.9 per pair overall. Food taken in the breeding season was studied by collecting pellets and prey remains from nests and the ground beneath. Prey were identified from fragments of feathers, fur or bones, and food biomass estimated by multiplying the number of prey items of a given species by a mean mass. 1539 prey items with a total biomass of 332 kg were identified. Birds accounted for 94% of prey in terms of number of items and 92% in terms of biomass. The most frequent prey species were Jays Garrulus glandarius (19% of prey items), pigeons Columba spp. (18%), thrushes Turdus spp. (14%) and woodpeckers Picidae (6%). The greatest shares of biomass were taken by pigeons — 35%, Jays —16%, hens —15%, field corvids — 5% and hares Lepus sp. — 4%. The most significant influences on the diet composition of a given pair were distances from the forest edge and from villages. Birds nesting in the forest interior took less advantage of Feral Pigeons and hens as prey. An avifaunal count using a combined-variant cartographic method was followed by the use of Ivlev's selectivity index to assess the predation pressure exerted by Goshawks on wild species of bird. This revealed greatest selective preferences towards Jays, field corvids, woodpeckers and thrushes as prey.
15
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The influence of raptors (Falconiformes) and ravens (Corvus corax) on populations of game animals

67%
Gryz J., Krauze-Gryz D.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 86
16
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Wybór drzew gniazdowych przez myszołowa, jastrzębia i kruka w Puszczy Augustowskiej

67%
Zawadzki G., Zawadzka D.
Sylwan
|
2017
|
tom 161
|
nr 08
Preferences of the Buzzard, Goshawk and Raven in choosing the trees for nesting were studied in northern part of the Augustów Forest (NE Poland) in 2014−2016 years. Study area is dominated by fresh and mixed fresh sites with Scots pine as a dominant species (86% of the forest area). Nests were searched in stands older than 60 years. We found 60 nests of Buzzard, 11 of Goshawk, and 31 of Raven. The diameter and the height of nest trees, the height of nest location, and length of tree crowns were measured. Diameter and height of surrounding trees were also determined. In total, 11 features of nest trees were assessed. For the location their nests, all analysed bird species preferred trees bigger and higher than neighbouring ones. The oldest stands (above 100 years old) were also preferred. The Raven built nests on trees average 139 years old, Goshawk – 119, while Buzzard – 109. Raven nested only on Scots pine, Goshawk on Norway spruce and Scots pine, while Buzzard on silver birch, Scots pine, European larch and Norway spruce. The Buzzard selected for nest trees growing in average distance about 1500 m from forest edge, while Goshawk and Raven preferred nest in a similar distance from the forest edge (707−783 m). Distance of the nests from forest road were similar for Buzzard and Goshawk – about 60 m, and in case Raven it was only 38 m. Raven chose for nesting old−growth islands located on forest edge, or even single old tree growing on plantation. The greatest plasticity in the nest location and habitat diversity was found for Buzzard. Both Goshawk and Raven had more precisely marked habitat and nest preferences.
17
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Liczebnosc myszolowa Buteo buteo i jastrzebia Accipiter gentilis we wschodniej czesci Puszczy Kozienickiej

67%
Drozdz R.
Kulon
|
2006
|
tom 11
9-18
18

A Sarcocystis species from goshawk [Accipiter gentilis] with Great Tit [Parus major] as intermediate host

67%
Svobodova M.
Acta Protozoologica
|
1996
|
tom 35
|
nr 3
19

Jastrzab ciagle przesladowany

67%
Zdunczyk J.
Przyroda Polska
|
1993
|
nr 12
12
20

Liczebnosc, rozmieszczenie i efekty rozrodu lesnych ptakow drapieznych i kruka Corvus corax W Wielkopolskim Parku Narodowym w latach 1992-1993

59%
Bednorz J., Kosinski Z.
Notatki Ornitologiczne
|
1997
|
tom 38
|
nr 1
27-41
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