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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Enter journal name and comment: Differentiation between pairs of populations was assessed using F ST. Feeding rate and food composition were shown to influence chick condition and survival in the nest.

The flock was taken as the sampling unit.

Genetic variability of Polish population of the Capercaillie Tetrao urogallus. This paper investigates the influence of environmental factors lines of trees along roads, number of livestock, volume of traffic, number of inhabitants on the level of Swallow mortality on the roads in question.

The diet of the Great Pampa-finch includes seeds rather than insects. It seems that both natural selection and sexual selection have led to the evolution of small nests in the Olivaceous Warbler. The nest construction was adapted to fit young willow trees. These data support the idea of high importance of small landscape structures for the biodiversity protection in intensively used farmland.

The vertical distribution of 94 bird species was recorded in evergreen forest, and of 90 in moist deciduous forest. Acta Ornithologica – Abstract Vol 38 2. Since the OCL is deposited at the end of growthwe propose that its relative thickness probably correlates with the amount of slow, residual growth, which our results suggest to be on the average larger in small birds.


Originally, the Hawfinch must have been a species of old, high forest.


Blackbirds, Turdus merulanest site selection, urban population, predation. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article ornithologicca a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Males with larger numbers of neighbours had a significantly lower mean song rate than those with a single neighbour. The aim of the study was to test ornithologiva the methods using the playback technique produce accurate data of population size when compared to the standard mapping and nest-searching methods.

Juncus maritimus was dominant in the SM and at BL. During the breeding season the number of birds killed in built-up areas was related positively to the number of cattle reared, the overall number of livestock including pigs and the number of inhabitants. In both species a peak in vocal output occurred shortly before sunrise and before sunset.

Interior Least Terns, Sterna antillarum athalassos, apparent nest success, flooding, nest losses, predator exclosures, Oklahoma Zduniak P.

Muzeum i Instytut Zoologii Polskiej Akademii Nauk – Acta Ornithologica

In all, Great Grey Shrike nests were found – Mortality was high on tree-lined sections of road in adverse weather conditions. The smallest amount of individuals 5. This fact should be attributed to the species nesting on steep coastal cliffs close to the livestock’s wintering areas.

Our administrator will review and update the journal description promptly. Possible mechanisms underpinning this increase in density are discussed. However, the efficacy of electrified enclosures and nest-site enhancements, as currently undertaken, is questionable acra of considerable annual variation in use by and protection of Least Terns.

Acta Ornithologica

All 58 nests were found in unmown and ungrazed vegetation. Flycatchers breeding in natural holes started laying eggs on average two days later 15 May and laid smaller clutches 6.


Box D, Santiago, Chile. There were differences with respect to threat postures with hybrids performing diagonal neck threats more often and intentional movements less often. Capercaillie, Tetrao urogallusgenetic variability, population structure, microsatellites. The numbers of juvenile Knots turning up on the Polish coast appear to depend not only on the lemming cycle in the breeding grounds, but also on other factors, like local weather conditions, which could influence the number of juveniles observed.

In the north, the range of the C. The variation in size and shape of Bearded Tit eggs was investigated in the Wielkopolska Region of western Poland in and The relationship between nest size and the likelihood of predation was still significant even when the effects of laying date and nest height were controlled. Wilcza 64, Warszawa. On 7 Mayone quail egg and a plasticine egg of similar size were placed in each of the artificial nests.

An abundant resident in Israelthe Graceful Warbler breeds in the northern and central parts of the country and has recently invaded desert areas following their human settlement. The results suggest a relatively low heritability of egg dimensions in the population studied.

Join the conversation about this journal. Males brought heavier portions of food consisting of larger numbers of lighter prey. No significant correlation was obtained between foliage abundance and the species diversity indices in the two types of vegetation.

An average parasitised nestling was supplied by its parents with 2.