scholarly journals Ecological distribution and population densities of raptors in the inner and outer zone of a Central European city

2018 ◽  
Vol 8 (1) ◽  
pp. 772-779
Author(s):  
G. Kopij
Keyword(s):  
Outer Zone ◽  
Passerine Birds ◽  
Falco Tinnunculus ◽  
Buteo Buteo ◽  
Milvus Migrans ◽  
Accipiter Nisus ◽  
Circus Aeruginosus ◽  
Wooded Area ◽  
The City ◽  
Milvus Milvus

Five raptor species were recorded as breeding in the city of Wrocław (293 km<sup>2</sup>) during the years 2002-2010: <em>Falco tinnunculus</em> (2.4 pairs per 10 km<sup>2</sup>), <em>Buteo buteo</em> (4.1 pairs/10 km<sup>2</sup> of wooded area), <em>Accipiter gentilis</em> (3.1 pairs/10 km<sup>2</sup> of wooded area), <em>Accipiter nisus</em> (1.6 pairs/10 km<sup>2</sup> of wooded area), <em>Circus aeruginosus</em> (0.2 pairs per 10 km<sup>2</sup>). All these species have increased in numbers over the last 20-30 years, both in the inner and outer zone of the city. <em>Falco tinnunculus</em> is a well-established raptor in the inner part of the city, while <em>Accipiter nisus,</em> <em>A. gentilis, Buteo buteo</em> started to infiltrate to the inner zone. In the last 70 years, a few cases of nesting were recorded for four other raptor species in Wrocław: <em>Milvus migrans, Milvus milvus, Pernis apivorus </em>and <em>Falco subbuteo, </em>but none of them was recorded in the inner zone of the city.<em> </em> Abundant and stable food supply (small mammals, columbids, corvids and small passerine birds), and freely available nesting and perching sites may contribute to this success.

scholarly journals The effect of urbanization on population densities of forest passerine species in a Central European city

2019 ◽  
Vol 27 (1) ◽  
pp. 207-220
Author(s):  
Grzegorz Kopij
Keyword(s):  
Bird Species ◽  
Outer Zone ◽  
Ficedula Albicollis ◽  
Forest Species ◽  
Central European ◽  
Wooded Area ◽  
Parus Ater ◽  
Anthus Trivialis ◽  
Phylloscopus Sibilatrix ◽  
The City

Abstract Typical, but less common, passerine forest species were selected for this study, such as Lullula arborea, Anthus trivialis, Troglodytes troglodytes, Prunella modularis, Turdus philomelos, Turdus viscivorus, Phylloscopus sibilatrix, Regulus regulus, Regulus ignicapillus, Muscicapa striata, Ficedula albicollis, Ficedula hypoleuca, Parus cristatus, Parus palustris, Parus ater, Certhia familiaris, Certhia brachydactyla, Oriolus oriolus, Garrulus glandarius, and Corvus corax. M. striata and T. philomelos were the most numerous among the 20 investigated species, the former one nested in a density of 6.7 pairs per 100 ha of wooded area, while the later one at 5.1 pairs per 100 ha. Density of most other species was below 3 pairs per 100 ha of wooded area. A. trivialis, P. cristatus and P. modularis were unexpectedly rare (< 1 pair per 100 ha). Otherwise, relatively numerous were T. troglodytes (1.8 p./100 ha), R. regulus (1.8 p./100 ha) and P. palustris (1.4 p./100 ha). P. cristatus, L. arborea, and T. viscivorus were the rarest species investigated (below 0.1 p./100 ha). Several bird species nested in wooded areas only in the outer zone of the city. This group included A. trivialis, R. regulus, P. ater, and C. corax. Population density of T. troglodytes, T. philomelos and O. oriolus were significantly higher in outer than in inner zone, while the reverse was true in the case of M. striata and F. hypoleuca.

scholarly journals Status and distribution of diurnal raptors in Central North Algeria, the case of Great Kabylia

2021 ◽  
pp. 261-272
Author(s):  
K. Hachour ◽  
N. Talmat–Chaouchi ◽  
R. Moula
Keyword(s):  
Common Species ◽  
Falco Tinnunculus ◽  
Widespread Species ◽  
Nest Sites ◽  
Milvus Migrans ◽  
Gyps Fulvus ◽  
Accipiter Nisus ◽  
Aquila Fasciata ◽  
Falco Eleonorae ◽  
North Algeria

In 2018 and 2019 thirteen species of raptors, with 407 individuals, were found nesting in Great Kabylia in Algeria. During this period, 196 raptor nest sites were located (Falco tinnunculus is not included as it thrives in many biotopes and tolerates anthropization). We noted a decrease in specific richness and abundance of raptors in the region compared to data for 1992. Some raptors were not seen during our study: Gypaetus barbatus, Pandion haliaetus, Falco biarmicus, Circaetus aeruginosus, and Falco eleonorae. We classified nesting diurnal raptors into 3 classes according to their relative abundance: (1) widespread species (10-26 %): F. tinnunculus, Hieraaetus pennatus, and Buteo rufinus cirtensis; (2) common species (5-10 %): Elanus caeruleus, Falco peregrinus, Circaetus gallicus, Falco naumanni, Gyps fulvus, and Milvus migrans; and (3) uncommon species (1-5 %): Neophron percnopterus, Accipiter nisus, Aquila fasciata, and Aquila chrysaeto. With the exception of N. percnopterus, which is classified as an endangered species, the raptors of Great Kabylia are mainly classified in the category of species of least concern (IUCN, 2020). Dataset published through GBIF (Doi: 10.15470/wt5dgi).

scholarly journals Stick supply to nests by cliff-nesting raptors as an evolutionary load of past tree-nesting

2019 ◽  
Vol 12 ◽  
Author(s):  
Alejandro Martínez Abraín ◽  
Dr. Juan Jiménez
Keyword(s):  
Gypaetus Barbatus ◽  
Milvus Migrans ◽  
Gyps Fulvus ◽  
Accipiter Nisus ◽  
True Tree ◽  
Forested Areas ◽  
Circaetus Gallicus ◽  
Aquila Fasciata ◽  
Milvus Milvus ◽  
Aquila Adalberti

The supply of sticks to cliff nests by many European raptors has been explained only as a functional means of decreasing ectoparasite loads in nests and for signalling nest occupancy. We provide here a historical explanation of this behaviour as we consider it represents an evolutionary load of formerly tree-nesting species. Basically, from this perspective, facultative tree/cliff-nesting species reproduce the nests they used to build originally on top of trees, but on cliffs. Facultative species (likely evolved in forested areas) that supply their cliff nests with sticks include Pandion haliaetus, Haliaetus albicilla, Milvus migrans, Circaetus gallicus, Buteo buteo, Aquila fasciata, A. pennata, A. chrysaetos, A. heliaca, Gypaetus barbatus Gyps fulvus and Neophron percnopterus. On the contrary, the only Falco species that solely nests in cliffs (F. eleonorae)) and does not supply its nests with sticks and should be considered a true cliff-nester, likely evolved in non-forested areas. All other Falco species that do not supply their cliff nests with sticks but can make use of tree nests made by other non-raptorial species, should also be considered as true cliff-nesters, likely evolved in more forested areas or times. Milvus milvus, Elanus caeruleus, Accipiter nisus, A. gentilis, Pernis apivorus, Aquila adalberti, A. clanga, A. pomarina and Aegypius monachus are true tree nesters, likely evolved in forested areas, which did not evolve the plasticity to nest directly on cliffs.

Monitoring rehabilitierter und ausgewilderter Greifvögel mittels Telemetrie als Erfolgskontrolle

2014 ◽  
Vol 42 (01) ◽  
pp. 29-35
Author(s):  
M. R. Hampel ◽  
M. Lierz ◽  
D. Fischer
Keyword(s):  
Falco Tinnunculus ◽  
Klinische Relevanz ◽  
Buteo Buteo

Zusammenfassung Gegenstand und Ziel: Aufgefundene Wildgreifvögel sollten nur nach medizinischer Diagnosestellung, entsprechender Therapie und anschließender Vorbereitung auf die Wildbahn ausgewildert werden. Hierfür sind je nach Greifvogelart und Alter der Tiere unterschiedliche Trainingsmethoden, inklusive falknerischer Methoden notwendig. Nach Abschluss dieser Maßnahmen und Auswilderung wurden Greifvögel mittels Telemetrie überwacht, um die Überlebensfähigkeit und die Prognose von Erkrankungen/Verletzungen für die Wildbahnfähigkeit einschätzen zu können. Zusätzlich sollte die Telemetrie als Überwachungsverfahren evaluiert werden. Dies fand in Kooperation mit Schülern statt, um einen Betrag zur Naturerziehung zu leisten. Material und Methoden: Drei Mäusebussarde (Buteo buteo) und ein Turmfalke (Falco tinnunculus) wurden fallspezifisch in der Klinik behandelt und nach Abschluss der Therapie mit einem an einer Schwanzfeder befestigten Sender entlassen und täglich per PKW oder Flugzeug verfolgt. Nach Peilung der Tiere erfolgte eine Sichtung mittels Fernglas. Die GPS-Daten der Aufenthaltsorte der Vögel wurden notiert. Ergebnisse: Ein Tier verlor den Sender frühzeitig, sodass keine Verfolgung möglich war. Die anderen drei Vögel wurden über mehr als 14 Tage überwacht. Ihre gute Reintegration in die Wildpopulation ließ sich durch beobachtetes Balz-und Paarungsverhalten belegen. Die weiteste Flugstrecke eines Vogels betrug 44 km. Schlussfolgerungen: Tiermedizinische Maßnahmen mit dem Ziel der Wiederherstellung der Wildbahnfähigkeit von Wildvögeln können erfolgreich sein. Die Telemetrie eignet sich zur Überwachung ausgewilderter Vögel. Die Handhabung der Technik ist problemlos durch Laien (z. B. Schüler) durchführbar. Klinische Relevanz: Übereinstimmend mit anderen Studien bestärken die Daten Tierärzte in der ordnungsgemäßen Durchführung von Rehabilitationsmaßnahmen an aufgefundenen Wildgreifvögeln.

scholarly journals Polychlorinated biphenyls in raptor and owl eggs in the Czech Republic

2012 ◽  
Vol 48 (No. 12) ◽  
pp. 363-368 ◽  
Author(s):  
I. Kustova ◽  
M. Vavrova ◽  
ILiterak
Keyword(s):  
Czech Republic ◽  
Tyto Alba ◽  
The Czech Republic ◽  
Pcb Congeners ◽  
Milvus Migrans ◽  
Marsh Harrier ◽  
Black Kite ◽  
Circus Aeruginosus ◽  
Lipid Weight ◽  
Aquila Heliaca

In 2001, raptor and owl eggs were collected for the purpose of detection of contamination by poly&shy;chlorinated biphenyls (PCBs) at 15 sites in the southeastern area of the Czech Republic. In total 31 unhatched eggs of 4 raptor species and 3 owl species were examined. PCB determination was carried out by high-resolution gas chromatography. PCB content was expressed in &mu;g per 1 kg of lipid weight for the major PCB congeners 28, 52, 101, 118, 138, 153 and 180, serving as indicators. In all examined eggs the indicator PCB congeners were found. The ranges of total values of indicator PCB congeners found in different raptor and owl species were as follows: kestrel (Falco tinnunculus) 37.0 and 44.3 (n = 2), black kite (Milvus migrans) 28.3&ndash;40.5 (n = 3), imperial eagle (Aquila heliaca) 66.4 (n = 1), marsh harrier (Circus aeruginosus) 45.1 (n = 1), barn owl (Tyto alba) 20.6&ndash;46.1 (n = 17), long-eared owl (Asio otus) 32.0&ndash;41.9 (n = 6) and tawny owl (Strix aluco) 47.5 (n = 1) &mu;g/kg of lipid weight. PCB congener 153 was the one most frequently found.

Responses of common buzzard (Buteo buteo) and Eurasian kestrel (Falco tinnunculus) to land use changes in agricultural landscapes of Western France

2010 ◽  
Vol 138 (3-4) ◽  
pp. 152-159 ◽  
Author(s):  
Alain Butet ◽  
Nadia Michel ◽  
Yann Rantier ◽  
Vincent Comor ◽  
Laurence Hubert-Moy ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Agricultural Landscapes ◽  
Falco Tinnunculus ◽  
Common Buzzard ◽  
Buteo Buteo ◽  
Eurasian Kestrel

scholarly journals Nest occupation and prey grabbing by saker falcon (Falco cherrug) on power lines in the province of Vojvodina (Serbia)

2008 ◽  
Vol 60 (2) ◽  
pp. 271-277 ◽  
Author(s):  
S. Puzovic
Keyword(s):  
Common Vole ◽  
Early Spring ◽  
Power Lines ◽  
Falco Tinnunculus ◽  
Corvus Corax ◽  
Hooded Crow ◽  
Circus Aeruginosus ◽  
Corvus Corone ◽  
Saker Falcon ◽  
Falco Cherrug

Research on nest occupation and prey grabbing by saker falcon (Falco cherrug) on power lines in Vojvodina (Serbia) was done in the period from 1986 to 2004. During three specially analyzed periods, saker falcon took the nests of raven (Corvus corax) in 91% of a total of 22 cases of nest occupation, and those of hooded crow (Corvus corone cornix) in only 9%. Saker falcon regularly grabs prey from different birds that occasionally or constantly spend time around power lines [Kestrel (Falco tinnunculus), hobby (Falco subbuteo), hooded crow (Corvus corone cornix), jack-daw (Corvus monedula), marsh harrier (Circus aeruginosus), hen harrier (Circus cyaneus), buzzard (Buteo buteo), and raven (Corvus corax)]. One year a studied pair of saker falcons on a power line in Donji Srem, Serbia grabbed prey from five different species of birds. Out of a total of 40 cases of prey grabbing in the period from January to December, as much 70% of the grabbed prey was taken from kestrel (Falco tinnunculus). During the winter and early spring, prey was grabbed predominantly by males; after May, prey was sometimes grabbed by females as well. Most of the grabbed prey was common vole (Microtus arvalis).

scholarly journals Prioritizing species conservation: does the Cape Verde kite exist?

2005 ◽  
Vol 272 (1570) ◽  
pp. 1365-1371 ◽  
Author(s):  
Jeff A Johnson ◽  
Richard T Watson ◽  
David P Mindell
Keyword(s):  
Phylogenetic Analyses ◽  
Species Conservation ◽  
Significant Risk ◽  
Taxonomic Status ◽  
Type Specimen ◽  
Cape Verde ◽  
Cape Verde Islands ◽  
Milvus Migrans ◽  
Black Kite ◽  
Milvus Milvus

The Cape Verde kite ( Milvus milvus fasciicauda ) is considered to be one of the rarest birds of prey in the world and at significant risk of extinction. For this reason there is great interest in both the taxonomic and the population status of this group. To help resolve its taxonomic status, we provide phylogenetic analyses based on three mitochondrial genes for a sampling of kites in the genus Milvus , including a broad geographical sampling of black kites ( Milvus migrans ), red kites ( Milvus milvus ), Cape Verde kite museum specimens collected between 1897 and 1924, and five kites trapped on the Cape Verde Islands during August 2002. We found that the historical Cape Verde kites, including the type specimen, were non-monophyletic and scattered within a larger red kite clade. The recently trapped kites from the Cape Verde Islands were all phylogenetically diagnosed as black kites. Our findings suggest that the traditional Cape Verde kite is not a distinctive evolutionary unit, and the case for species status, as recently suggested by others, is not supported. We do find support for recognition of at least one clade of yellow-billed kites, traditionally considered as a black kite subspecies, as a distinctive phylogenetic species.

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