Factors influencing family rupture and parent-offspring conflict in the Black Kite Milvus migrans

Ibis ◽  
2008 ◽  
Vol 132 (1) ◽  
pp. 58-67 ◽  
Author(s):  
JAVIER BUSTAMANTE ◽  
FERNANDO HIRALDO
Keyword(s):  
Milvus Migrans ◽  
Factors Influencing ◽  
Black Kite

scholarly journals Environmental factors affecting the wintering raptor community in Armenia, Southern Caucasus

2021 ◽  
Author(s):  
Gianpasquale Chiatante ◽  
Michele Panuccio
Keyword(s):  
General Pattern ◽  
Abundant Species ◽  
Theoretic Approach ◽  
Factors Affecting ◽  
Milvus Migrans ◽  
Gyps Fulvus ◽  
Black Kite ◽  
Southern Caucasus ◽  
And Migration ◽  
Information Theoretic Approach

AbstractThe species–habitat relationships can change during the year because of the seasonality of resources. Therefore, the investigation of habitat use by animals in each season plays a fundamental role in their conservation. The main aim of this research was to investigate the raptor community that spends the winter in Armenia, southern Caucasus, and to explore its relationship with environmental features, such as land use and topography. During January 2012, we collected data by carrying out 15 roadside counts along which we calculated three community parameters: the relative abundance, the species richness, and the species diversity. Then, we carried out a multiple linear regression with the Information-Theoretic Approach, to explain the relationship between the parameters and environmental variables. Besides, we computed a Canonical Correspondence Analysis (CCA) between the species and the environment around their observations. As a general pattern, the community was associated with permanent crops, maybe because of their heterogeneity, which in turn allows them to support higher densities of prey during the winter. The most abundant species was the Black Kite (Milvus migrans), followed by the Common Kestrel (Falco tinnunculus) and the Griffon Vulture (Gyps fulvus). To our knowledge, this is one of the first studies investigating the wintering raptor community in the Caucasus, with raptors generally studied in this area during the breeding season and migration.

scholarly journals Black Kite Milvus migrans in Slovenia – its distribution, phenology, breeding and habitat

Acrocephalus ◽  
2018 ◽  
Vol 39 (178-179) ◽  
pp. 71-83
Author(s):  
Dejan Bordjan
Keyword(s):  
Sea Level ◽  
Arable Land ◽  
Breeding Population ◽  
Water Bodies ◽  
Lower Percentage ◽  
Breeding Density ◽  
Breeding Sites ◽  
Milvus Migrans ◽  
Black Kite

Abstract Between 1984 and 2017, 1,388 Black Kites were recorded, mostly in lowlands with 70% of observations made at Dravsko polje. They were observed from sea level to around 1,600 m a.s.l. with an average elevation of 271 m a.s.l. The species was present in Slovenia from mid-March to early December with indistinct spring and autumn migrations. The highest number of observations was recorded in May. The Black Kite was observed in 71 out of 238 10x10 km grid squares in Slovenia (29.8%), with more observations around known breeding sites and at sites with higher observer effort. Both the number of observations and the number of probable and confirmed breeding pairs increased. In 2011–2018, 10 breeding pairs were found at 7 sites (3–7 per year). Additionally, 11 probable breeding pairs at 9 sites (0–6 pairs per year) were found. The breeding population in 2011–2018 is estimated at 10–21 pairs with an average breeding density of 0.3–0.9 breeding pairs per 100 km2. The highest density was recorded at Dravsko polje with 0.6–2.2 breeding pairs per 100 km2. If possible breeding (breeding attempts) were also taken into consideration, the estimate would be up to five breeding pairs higher. The species was recorded at known breeding sites in most years after the breeding was confirmed. Black Kites were observed closer to larger water bodies and to rubbish tips than expected by chance. More Black Kites were recorded in areas with a lower percentage of forest and arable land and a higher percentage of meadows, settlements and wetlands.

Roosting habits and habitats of the Indian Flying Fox Pteropus medius Temminck, 1825 in the northern districts of Tamil Nadu, India

2021 ◽  
Vol 13 (12) ◽  
pp. 19675-19688
Author(s):  
M. Pandian ◽  
S. Suresh
Keyword(s):  
Colony Size ◽  
Tree Species ◽  
Tamil Nadu ◽  
Water Bodies ◽  
Species Selection ◽  
Milvus Migrans ◽  
Black Kite ◽  
Geographical Regions ◽  
Significant Difference ◽  
Flying Fox

This paper pertains to the study on roosting habits and habitats of the Indian Flying Fox Pteropus medius Temminck, 1825 in 12 villages of four northern districts—Vellore, Krishnagiri, Tiruvannamalai, and Viluppuram—of Tamil Nadu. Studies targeted roosting tree species, population status, diurnal-roosting behaviour, interactions with other animals, and probable threats to the species. A total of 22,365 individuals of the species were observed in 72 roosting colonies in 72 trees belonging to nine families, 11 genera, and 13 species. The tree species that harbored the greatest population of P. medius (n= 12,465) were those of Tamarindus indica L. (Fabaceae) (n= 39), followed by Ficus religiosa L. (Moraceae) (n= 3,960), Madhuca latifolia J.F. Macbr. (Sapotaceae) (n= 2,760), and Ficus benghalensis L. (Moraceae) (n= 1,620). One-Way ANOVA revealed that a significant relationship exists between  colony size and tree diameter at breast height (dbh), and their canopy size (p <0.05). However, no significant difference occurred between the colony size and tree height. The time taken for emergence of individuals of the colony from the canopy for foraging varied between 20 and 40 min after 1750 h in the evening. The species mostly roosted on trees proximal to human settlements, electrical power lines, and water bodies. Individuals of P. medius used various tree species in different areas in different geographical regions and did not maintain any consistency in roosting tree species selection. A majority of individuals (88.7 %; n= 887) were found roosting using both legs and a minority of P. medius (11.3 %; n= 113) were clinging to tree branches using one. Individuals of P. medius flew to nearby water bodies to quench thirst and cool their bodies. Mating was observed during day roost in 146 pairs including male-female fellatio in seven pairs. Smoke from shrines in sacred groves, pruning of branches for various cultural reasons, populations of House Crow Corvus splendens (Vieillot, 1817) (Corvidae), Black-winged Kite Elanus caeruleus (Desfontaines, 1789) and Black Kite Milvus migrans (Boddaert, 1783) (both Accipitridae) were key disturbances to roosting populations of P. medius.

Nests of Black Kite (Milvus migrans govinda) in Urban Landscape of Kolkata, India

2016 ◽  
Vol 70 (2) ◽  
pp. 201-205
Author(s):  
Subhendu Mazumdar ◽  
Dipankar Ghose ◽  
Goutam Kumar Saha
Keyword(s):  
Urban Landscape ◽  
Milvus Migrans ◽  
Black Kite ◽  
Milvus Migrans Govinda

Nesting dispersion of a Black Kite population in relation to location of rabbit warrens

1994 ◽  
Vol 72 (9) ◽  
pp. 1680-1683 ◽  
Author(s):  
Javier Viñuela ◽  
Rafael Villafuerte ◽  
Claudine De Le Court
Keyword(s):  
Population Density ◽  
National Park ◽  
Oryctolagus Cuniculus ◽  
Considerable Increase ◽  
Breeding Area ◽  
Doñana National Park ◽  
Main Prey ◽  
Milvus Migrans ◽  
Black Kite ◽  
Feeding Resources

Previous studies have shown that the rabbit (Oryctolagus cuniculus) is the main prey of the Black Kite (Milvus migrans) in Matasgordas (Doñana National Park, southwestern Spain), and that the reproductive success of pairs is enhanced with increasing rabbit consumption. In our study area, rabbits live mainly in large warrens patchily distributed across the breeding area of Black Kites. Rabbit consumption was higher for Black Kite pairs having warren entrances close to their nests. During the 3 years of the study, this population of Black Kites suffered a considerable increase. New pairs in the area selected nesting trees inside areas with a high density of rabbits. The pattern of Black Kite aggregation in our study area, where they breed in a "colony" with a population density among the highest recorded, can be explained, at least partially, by rabbit aggregation. Defense of feeding resources could help to explain the territorial behavior of Black Kites. Coloniality and feeding territoriality are not mutually exclusive.

scholarly journals When and where mortality occurs throughout the annual cycle changes with age in a migratory bird: individual vs population implications

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Fabrizio Sergio ◽  
Giacomo Tavecchia ◽  
Alessandro Tanferna ◽  
Julio Blas ◽  
Guillermo Blanco ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Annual Cycle ◽  
Migratory Bird ◽  
Seasonal Effects ◽  
Conservation Strategies ◽  
Gps Tracking ◽  
Milvus Migrans ◽  
Black Kite ◽  
Breeding Migration

AbstractThe annual cycle of most animals is structured into discrete stages, such as breeding, migration and dispersal. While there is growing appreciation of the importance of different stages of an organism’s annual cycle for its fitness and population dynamics, almost nothing is known about if and how such seasonal effects can change through a species lifespan. Here, we take advantage of the opportunity offered by a long-term satellite/GPS-tracking study and a reliable method of remote death-detection to show that certain stages of both the annual and life cycle of a migratory long-lived raptor, the Black kite Milvus migrans, may represent sensitive bottlenecks for survival. In particular, migratory journeys caused bursts of concentrated-mortality throughout life, but the relative importance of stage-specific survival changed with age. On the other hand, the balance between short-stages of high mortality and long-stages of low mortality made population-growth similarly dependent on all portions of the annual cycle. Our results illustrate how the population dynamics of migratory organisms can be inextricably linked to ecological pressures balanced over multiple stages of the annual cycle and thus multiple areas of the globe, suggesting the frequent need for challenging conservation strategies targeting all portions of a species year-round range.

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.

scholarly journals Current condition of the ornithofauna of the Alexandria Dendrological Park

2019 ◽  
Keyword(s):  
Species Composition ◽  
Bird Species ◽  
Quantitative Composition ◽  
Ecological Groups ◽  
Bird Population ◽  
Milvus Migrans ◽  
Black Kite ◽  
Night Heron ◽  
Ciconia Nigra ◽  
Data Book

The species composition of birds of the Alexandria Dendrological Park has been analyzed. The studies were conducted in 2008–2018. In total 148 bird species were registered (35% of the ornithofauna of Ukraine). Birds were analyzed by biotopic groups, nature of stay and type of nesting. It was found that in the conditions of the Alexandria Dendrological Park, the dominant ecological groups were dendrophiles (80 species). According to the nature of their stay, nesting birds accounted for 90 species, migratory – 48 species, wintering – 31 species. Depending on the type of nesting, canopy-nesting and hole-nesting birds prevailed – 27.8 and 24.4% respectively. Representatives of Piciformes and Passeriformes make up a significant part of the nesting species, which is 10 and 57.8% respectively. Falconiformes are represented by 4 species, which is 4.4% of the total number of nesting species. The value of the park also consists in the presence of favorable wetlands for wintering and forage migration of a number of taxon birds in its territory. As a result, the bird population is growing. The emergence of new bird species in recent years can provide a unique indication of the importance of ornithocenosis in these areas. This concerns in particular Green Woodpecker, Black kite, Honey Buzzard, Night Heron, Stock Dove, Spotted Crake. It has been established that new species appear in the park, settling from nearby or remote areas. During the years of observation, 9 species from the Red Data Book of Ukraine (Ciconia nigra, Netta rufina, Haliaeetus albicilla, Milvus migrans, Buteo rufinus, Pandion haliaetus, Bucephala clangula, Picus viridis, Columba oenas) have been recorded. The factors influencing the species composition of birds have been analyzed. They include felling of trees, thinning of shrubs, uncontrolled recreation and direct predation from dogs. One of the main problems limiting the number of birds in the park is trespassing of logging processes, in particular during the nesting period. In the future, more comprehensive studies are planned on the quantitative composition of birds, as well as features of the topical distribution according to the biocenosis.

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