Established in as Acta Ornithologica Musei Zoologici Polonici, since continued under the present title. Published twice a year by the Natura Optima. Contents of Acta Ornithologica Vol. 40, No 2, Winter Campos F.1, Corchero -Gutiérrez F.2, Hernández M. A.3, Rivas J. M.4, López-Fidalgo J.5 Acta Ornithologica. Country, Poland – SIR icon SIR Ranking of Poland. H Index. Subject Area and Category, Agricultural and Biological Sciences.

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A total of Whinchat territories were found in the study area, all of them in abandoned crop fields with a well-developed layer of dried perennials from the previous year Tanacetum vulgareArtemisia vulgarisSolidago sp.

Evolution of the ornithologicaa number of citations and ornitholpgica self-citations received by a journal’s published documents during the three previous years. White Stork, Ciconia ciconia, birds, methods, migration, phenology. Our administrator will review and update the journal description promptly. Flock size decreased throughout winter, but, simultaneously, the number of territorial birds was stable. Factors affecting fluctuations of the Aquatic Warbler Acrocephalus paludicola population of Byelarussian mires.

Collar rings were used to collect the food brought to the nestlings. Nests in linear habitats ognithologica significantly higher breeding losses Clutch size was negatively correlated with total nest mass but positively correlated with the proportion of the mass of the lining in the total nest mass. Acta Ornithologica – Abstract Vol 39 2.


The Carpathian population of the Capercaillie was found to be genetically structured, and in the Lower Silesian Forest population heterozygosity was lower, possibly as a result of the lek mating system and also the dramatic reduction in numbers.

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Bird flocks were observed also in open areas and they preferred to feed in pastures. The types of food brought by each sex also varied significantly. The large proportion of locusts and flies in the diet indicates that the Cattle Egret may play an important role in pest control. Cluster analysis showed that differences between sexes were expressed significantly more strongly than the individual differences. In particular, wind, geography and navigational abilities seem to interact to shape the orientation behaviour of migrating Honey Buzzards, perhaps to minimize the risks of non-stop powered flight over the water.

The average times of the beginning, maximum intensity and end of nocturnal migration were found to be related to photoperiodic factors. Interior Least Terns, Sterna antillarum athalassos, apparent nest success, flooding, nest losses, predator exclosures, Oklahoma. The time spent on each type of aerial hunting behaviour depended on factors like breeding stage, time of day, wind speed, number of strikes, number of successful strikes, and the time spent hunting.

You need JavaScript enabled to view it. In the forest, every individual territory consisted of several clumps of mistletoe on a few trees standing close together. It seems that Spanish populations are in opposition to the Bergmann’s rule predictions.

Not every article in a journal is considered primary research orinthologica therefore “citable”, this chart shows the ratio of a journal’s articles including substantial research research articles, conference papers and reviews in three year windows vs. Olivaceous Warbler, Hippolais pallidanest size, breeding, nest predation, fledgling success. A multivariate study was carried out in order to investigate the most influential habitat variables and related features in the selection of breeding cliffs by the Griffon Vulture in Crete.


Originally, the Hawfinch must have been a species of old, high forest. The core of the limb bone cortex of mammals and birds is made of rapidly deposited, fibro-lamellar bone tissue also present in non-avian theropodswhich is usually surrounded by an avascular outer circumferential layer OCL of slowly deposited parallel-fibered bone. The nest entrance diameter ranges onithologica 5. They ornuthologica true navigational abilities in choosing the shorter crossing between Pantelleria and Tunisia and showing a curvilinear migration.

Blackbirds, Turdus merulanest site selection, urban population, predation. Different pairs timed their breeding such that the beginning of the season from October to September ornityologica the next calendar year overlapped the dates of completion from April to December. Accuracy and efficiency of different techniques for censusing territorial Middle Spotted Woodpeckers Dendrocopos medius.

Honey Buzzard, Pernis apivorusmigration, water crossing, orientation, geography, wind, navigation.

Muzeum i Instytut Zoologii Polskiej Akademii Nauk – Acta Ornithologica

Three types of nest sites were distinguished: Even though the underestimation was negatively correlated with the true density of Hawfinches, the figures obtained by both methods reflected year-to-year changes in a similar way. This result is expected, for instance, if E.

The vocalization period of the Little Crake is short but intensive, peaking before the start of incubation. This seems to be related to their hybrid origin, since Greylag Geese most often show diagonal neck and forward threat displays. The water depth at the nest sites varied.