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Fridtjof Ziesemer

Fridtjof Ziesemer
Ornithologische Arbeitsgemeinschaft für Schleswig-Holstein und Hamburg

Dr. rer. nat.

About

24
Publications
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117
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Introduction

Publications

Publications (24)
Article
Full-text available
Ziesemer, F., M. Schlüter & T. Grünkorn 2021. Video-Beobachtungen an Horsten des Wespenbussards Pernis apivorus in Schleswig-Holstein. Corax 24: 369-380. We analyzed data from two nests, each with two nest- lings aged about three weeks until after fledging. Videos (with audio at one nest) and some photos were taken by day and by night, with some g...
Article
Full-text available
Honey Buzzards Pernis apivorus in the Danish Wohld, Schleswig-Holstein, in the years 2016 and 2017 in comparison to the period 1985―1995 The population development of the Honey Buzzard in many parts of Europe, including Schleswig-Holstein is uncertain. However, from the Danish Wohld, a 280 km2 area within Schleswig-Holstein, results are available...
Article
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Four adult male Honey-buzzards Pernis apivorus were fitted with GPS satellite transmitters in northern Germany. The tags were deployed during the nestling period and the birds followed until they started their autumn migration. For one male, data were also collected throughout the following breeding season. The four birds occupied home ranges that...
Presentation
Full-text available
Eight adult Honey Buzzards breeding in Germany were tracked using satellite telemetry, some of them for several years. The males and females of two pairs migrated separately. The females left the breeding area about 18-19 August some 7-10 days before the males which departed around 25-29 August. All birds migrated to West Africa as far south as Gab...
Article
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Age and reproduction in female Goshawks (Accipiter gentilis) breeding in Schleswig- Holstein — is there evidence for senescence? In most populations of long-lived animals reproductive performance initially improves with age. The usual life-history pattern is a strong increase early in life followed by a leveled-out plateau of constant high perform...
Article
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New results from telemetric studies of Northern Goshawk (Accipiter gentilis) and European Honey-buzzard (Pernis apivorus) Northern Goshawk hunting ranges are related to the amount of woodland edge and other habitat features, prey density, season and the social status of the birds. The ranges may vary in a given month from 200 to 6,400 ha. The terri...
Article
Full-text available
Home range and behaviour of Honey Buzzard (Pernis apivorus) during brood-rearing and at the begin of autumn migration - a radio telemetry study 2 male and 2 female Honey Buzzards were radio-tracked in 3 study areas in the period 1993-1995 in Schleswig-Holstein. All birds produced fledglings. Home ranges of females were larger (4,350 resp. 4,500 ha...
Article
Full-text available
The breeding birds of an agricultural area with hedgebanks in east Schleswig-Holstein A census of breeding birds was carried out during 1991 and 1992 in 100 hectares of east Schleswig- Holstein. 96 resp. 116 territories of bird species breeding in hedgebanks, on arable land and pastures were registered (Table 1). Another 12 species held territories...
Article
The Schleswig-Holstein extensive farmland programme is one of the most comprehensive ones in Germany. On approximately half of the 27 000 hectares under contract in 1988 additional improvement measures for natural habitats have been incorporated in the management agreements. These habitats have to be maintained for at least 20 years. Contrary to th...
Article
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Pheasants (Phasianus colchicus) released in Schleswig-Holstein 1955-1978 Resulting from a questionnaire among hunters in Schleswig-Holstein it is estimated that between 15,000 and 60,000 pheasants have been released yearly in the period 1955–1978 (figures 2 and 3), with a tendency towards an increase in the number of released pheasants over the yea...
Article
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The state of Black-tailed Godwit (Limosa limosa), Redshank (Tringa totanus), Snipe (Gallinago gallinago), Ruff (Philomachus pugnax) and other species of lowland wet grasslands in Schleswig-Holstein Estimated population size (territorial pairs) in the period 1982–1986 was 1,500 (Godwit), 6,000 (Redshank), 2,000 (Snipe) and 170 breeding reeves. Whinc...
Article
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Factors determining the breeding density of Tawny Owl and Long-eared Owl in Schleswig-Holstein – a comparison Size and character of the study areas and the breeding densities are summarized in table 1, the distribution of the areas is shown in figure 1. The Tawny Owl is spread all over the Schleswig-Holstein mainland, today as in the last century....
Article
Full-text available
"Erweiterte Fassung eines Gutachtens für die Oberste Jagdbehörde des Landes Schleswig-Holstein ..." English summary. Thesis (doctoral)--Universität Kiel, 1983. Includes bibliographical references (p. 118-122).
Article
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A stamp-pad ink to mark feathers permanently An alcohol-soluble ink designed to mark metal sheets, wooden materials, photographic films and oiled paper has successfully been used to mark feathers. The idea was to stamp a bird’s wing- and tail-feathers with an individual code, thereby allowing to assign moulted feathers to individual birds even if t...
Conference Paper
Full-text available
During the breeding season, goshawk diet has been assessed by collecting prey remains, caging the young, and by direct observation at the nest. Outside the breeding season the only technique used extensively in the past was searching for pluckings. More recently, radio-tracking has been used to estimate the impact of goshawk predation on prey speci...
Article
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Distribution and Population Density of the Little Owl (Alhene noctua) in Schleswig-Holstein In Central Europe the Little Owl has established itself in the agrarian ecosystem, and, thus, in facultative synanthropy. Using the population of Schleswig-Holstein (on the northern border of its distributional range) as an example, the elements of a suitab...
Article
Full-text available
The status of owls in the agricultural landscape of Schleswig-Holstein may have been influenced more by the structure of soils and agriculture than by pesticides. Whereas numbers of Tawny Owl and Long-eared Owl seem to have remained stable and are thus not endangered, numbers of Little Owl and Barn Owl have decreased considerably. This holds partic...
Article
Full-text available
Goshawks (Accipiter gentilis) lose aluminium leg rings Two Goshawks had lost their Vogelwarte-Helgoland aluminium rings earlier than 5 resp. 8 months after ringing. The most likely hypothesis is, that it happened due to inner tension of the material. But in any case, if Goshawks do lose rings, one has to put into consideration that any calculation...
Article
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Distribution, breeding density and population development of the Barn Owl (Tyto alba) in Schleswig-Holstein 1. The Barn Owl’s breeding area covers all landscapes of Schleswig-Holstein. But from the North Frisian lslands there is no up to date information. 2. Until the middle of the 20th century the density of the Owl population was obviously much...
Article
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The Situation of Black Grouse (Lyrurus tetrix) in Schleswig-Holstein. Numbers of Black Grouse declined in Schleswig-Holstein at least since 1850. Around 1890 swedish Black Grouse have been released. The population showed a positive development from then on and reached a maximum at about 1920 until 1930. As a similar development has been recorded f...
Article
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Breeding density and breeding success of Barn Owls (Tyto alba) in a study area before and after the erection of nest boxes From 1975 to 1979 a census was taken of the number of breeding Barn Owls in a lowland area of 100 km2 of Schleswig-Holstein. The findings were as follows. In September 1976 28 nest boxes were erected, this tripled the number of...
Article
Full-text available
The method of surveying Tawny Owl (Strix aluco) territories by the aid of a tape-recorder. The method is described in detail: the territorial call of a male Tawny Owl is replayed from the tape every 200 - 1000 m along the roads in a study-area. Locations of answering owls are mapped immediately. Experience shows, that the time for each stop should...
Article
Full-text available
Breeding density and breeding biology of Long-eared Owl, Asio otus, and European Kestrel, Falco tinnunculus, in Schleswig-Holstein A study area of 200 km2 near the town of Schleswig (northern Germany) was surveyed in the years 1968-1971. The area is characterized by extended grasslands and scattered spruce groves, in which many crow nests are avai...
Article
Full-text available
A survey of breeding birds in 10 gravel pits south of the city of Schleswig resulted in (pairs): Moorhen (1), Oystercatcher (1), Common Ringed Plover (2), Little Ringed Plover (7), Northern Wheatear (3), Sand Martin (40), Black Redstart (4).

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