Acrocephalus最新文献

{"title":"Recent Data on the Danube Delta (Romania) Avifauna from the 2014 and 2015 Summer Seasons","authors":"B. Kiss, V. Alexe, A. Doroșencu, Tănase Ceico, Nimrod B. Kiss, Mihai Marinov","doi":"10.1515/acro-2016-0006","DOIUrl":"https://doi.org/10.1515/acro-2016-0006","url":null,"abstract":"Abstract A number of faunistically interesting observations related to the avifauna of the Danube Delta (Romania) are presented. In the spring of 2015, a mass mortality event with a minimum of 118 dead birds occurred in a major Dalmatian Pelican Pelecanus crispus colony in the Black Sea lagoons caused by the avian flu virus, strain H5N1. A possible hybrid between Little Egret Egretta garzetta and Western Reef Heron Egretta gularis was observed. The first nesting of Ruddy Shelduck Tadorna ferruginea in the Danube Delta was documented. Goldeneye Bucephala clangula and Smew Mergus albellus are re-colonising the areas they abandoned in the early 20th century. New data regarding the relocation of Pallas’s Gull Larus ichthyaetus colony in the Danube Delta as a result of hydromorphological changes in the bay, nesting and defence strategies against Caspian Gulls Larus cachinnans are described. Probable nesting of Citrine Wagtail Motacilla citreola in the Danube Delta was documented in 2014 for the first time.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"85 - 92"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2016-0006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Proportion of Cropland Influences Negatively the Occurrence of Breeding Birds in an Alkali Grassland Habitat in NW Serbia","authors":"Dejan Đapić, T. Mérő","doi":"10.1515/acro-2016-0005","DOIUrl":"https://doi.org/10.1515/acro-2016-0005","url":null,"abstract":"Abstract Grasslands host a high diversity of plant and animal species. In Serbia, most alkali grasslands are located in the province of Vojvodina. The majority are not subject to conservation. The aim of the study was to investigate the relationship between the proportion of croplands and (1) the number of breeding species and (2) the number of breeding pairs in the alkali grasslands of the upper Mostonga River catchment basin (NW Serbia). The size of the study area was 400 ha. Birds were surveyed along seven parallel transects eight times per breeding season. Lengths of the cross sections of both grasslands and croplands were measured. The proportion of croplands per transect was calculated by dividing the total length of cross sections of croplands by the total length of transect. The relationship between the proportion of croplands and the number of breeding pairs and the number of breeding species, respectively, was studied using simple linear regression. We recorded a total of 171 nesting pairs belonging to 23 species in the alkali grassland investigated, with breeding densities between 2.2 and 10.3 pairs per 10 ha. The number of species per transect ranged between 6 and 11. The most abundant species were Skylark Alauda arvensis, Yellow Wagtail Motacilla flava and Corn Bunting Emberiza calandra. The numbers of breeding pairs (F6 = 21.761, P < 0.0001) and of breeding species (F6 = 13.758, P = 0.001) were both influenced negatively by the proportion of croplands. These findings highlight the need for coordinated conservation measures on the alkali grasslands of Vojvodina.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"79 - 84"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overview of occurrence of the Short-eared Owl Asio flammeus between 1995 and 2015 in Slovenia and its probable breeding in irruptive year 2008","authors":"A. Vrezec","doi":"10.1515/acro-2016-0003","DOIUrl":"https://doi.org/10.1515/acro-2016-0003","url":null,"abstract":"Abstract Between 1995 and 2015 the number of records of Short-eared Owl Asio flammeus in Slovenia increased drastically, especially after 2007, but the species occurred regularly every year since 2002. Before that, the Short-eared Owl was regarded as a very rare migrant in Slovenia. Most of the observations were from wintering and migration periods, and the most important areas for the species in Slovenia were Ljubljansko barje, Lake Cerknica, surroundings of the water reservoir Medvedce and coastal wetlands. In 2008 and 2013 the Short-eared Owl occurred in large numbers, and these years were regarded as irruptive. Flocks of 2 to 8 birds were observed. At Ljubljansko barje, increased numbers of observed Short-eared Owls coincided with a large population of small mammals (species of the genus Apodemus and Microtus) and poor snow cover in 2008, and at least three communal roost sites were found that year. In the irruptive year 2013 there was a greater number of Short-eared Owls observed at the Medvedce water reservoir. On the plain at Lesce near the village of Smokuč an injured second year female was found at the end of March 2008 with a developing brood patch in its initial stage. It is likely that the female attempted to nest, which confirms the status of the species as occasional breeder in Slovenia. The last confirmed breeding in Slovenia was recorded in 1936 at Ljubljansko barje. In addition to local conditions (population of small mammals, snow cover) the frequency of occurrence of the Short-eared Owl in Slovenia is also affected by the population of development in the Boreal region and changes in migratory characteristics of the species in Europe. Therefore, an increase of the number of Short-eared Owls in Slovenia is expected in the future, as well as breeding attempts by this nomadic owl in seasons with high populations of small mammals and green winters, of course, if appropriate meadow habitat is still preserved.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"57 - 68"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2016-0003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Annual dynamics, nature-conservancy evaluation and an overview of data on the occurrence of waterbirds at Šaleška Lakes (N Slovenia)","authors":"Boštjan Deberšek, Dejan Bordjan","doi":"10.1515/acro-2016-0001","DOIUrl":"https://doi.org/10.1515/acro-2016-0001","url":null,"abstract":"Abstract Between September 2014 and August 2015, 32 systematic surveys of waterbirds were carried out in 10-day periods in the area of Šaleška Lakes. The main objectives of the surveys were to establish the birds’species structure and abundance as well as to assess the area’s significance for their breeding, migration and overwintering. A total of 8927 individuals belonging to 53 species were recorded. Most species were observed at the end of March (27), whereas the highest number of individuals were registered in early January (535). The lowest number of individuals were counted in May (73). Mallard Anas platyrhynchos, Great Crested Grebe Podiceps cristatus, Mute Swan Cygnus olor and Grey Heron Ardea cinerea were observed during all counts. An additional 10 species were registered in at least 50% of the 10-day periods. The highest number of individuals (2891) and species (34) were counted at Lake Šoštanj, the highest number of individuals (295) and species (21) in a single 10-day survey period at Lake Gaberke. Most nestlings and nesting species were recorded at Lake Velenje. The majority of species occurred on all lakes within the research area, while some of them frequented certain lakes only exceptionally. The lowest numbers of birds were observed in central parts of all major waterbodies, particularly at Lake Velenje. Distribution of waterbirds at Šaleška Lakes is greatly influenced by the presence and distribution of people along them, as well as by the depth and riparian vegetation of the lakes and number of suitable roosting places. The number of breeding species is higher than in the 1994-2003 period. Little Bittern Ixobrychus minutus, Kingfisher Alcedo atthis and Great Reed Warbler Acrocephalus arundinaceus are new breeders for the area. The most abundant breeder is the Mallard with up to 16 pairs. The area’s breeders of the greatest conservation concern are the Little Bittern, Great Reed Warbler and Reed Warbler Acrocephalus scirpaceus, with the latter boasting the greatest share of the national breeding population (5%) in the area. Generally, most species occur during the migration season, although none of them in the numbers of conservation concern. Among the 33 waterbird species observed during the International Waterbird Censuses, five were recorded in all 18 years. Pochard Aythya ferina and Coot Fulica atra are of the greatest conservation concern, whereas the greatest share of the national population is reached by the Coot and Great Crested Grebe. In spite of the fact that the numbers of overwintering waterbirds in Slovenia are increasing, their numbers are declining at Šaleška Lakes. Among the 13 species recorded during more than ten International Waterbird Counts in the area researched, eight species are experiencing negative trends.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"47 - 5"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wintering sites of Wallcreeper Tichodroma muraria on the east Adriatic coast","authors":"G. Lukač, S. Vujčić-Karlo, Zlatko Ružanović, Ivana Adžić, Marijan Milovac, Roberto Stelko","doi":"10.1515/acro-2016-0013","DOIUrl":"https://doi.org/10.1515/acro-2016-0013","url":null,"abstract":"Abstract Wallcreeper Tichodroma muraria was observed during cold winters in different parts of Croatia, along the Adriatic coast, on islands as well as inland. Their origin remains unknown, but they may belong to the population nesting in the Alps or in Dinaric parts of Bosnia and Herzegovina and Montenegro. The overwintering along the Adriatic coast was explored during field observations, but also from the literature and museum data. The field investigations were carried out in Istria, North Dalmatia, Paklenica NP, Kornati NP and central Dalmatia, Krka NP. In total, 96 observations were made: 35 specimens from museum collections and literature and 61 during field research. The Wallcreeper was observed in Velika and Mala Paklenica canyons in Paklenica NP during cold winters, but not during milder winters. In the Paklenica NP, the earliest individuals were observed on 10 Oct and the latest on 28 Apr. On the complete east Adriatic coast and in Croatian inland, the earliest record was made on 6 Sep and the latest on 2 May. There are 5-10 individuals overwintering in Paklenica National Park.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"220 - 226"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2016-0013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rare birds in Slovenia in 2015 – Slovenian Rarities Committee’s Report","authors":"J. Hanžel","doi":"10.1515/acro-2016-0004","DOIUrl":"https://doi.org/10.1515/acro-2016-0004","url":null,"abstract":"Summary This report by the Slovenian Rarities Committee presents records of rare bird species in Slovenia in 2015, with some addenda for previous years. The numbers in brackets refer to the number of records (first number) and individuals (second number) recorded between 1 Jan 1950 and 31 Dec 2014. Since 1 Jan 2013, submission to the Committee has been required for 37 additional species, 17 of which are regional rarities. Records of these species are not numbered, since records from previous years were not collected by the Committee. One new species, the Desert Wheatear Oenanthe deserti, was added to category A. Other notable observations were the first record of Parrot Crossbill Loxia pytyopsittacus after 1909, the second record of Baillon’s Crake Zapornia pusilla, the third and fourth records of Calandra Lark Melanocorypha calandra, the fourth of Long-legged Buzzard Buteo rufinus, the fifth of Richard’s Pipit Anthus richardi and the sixth of Grey Phalarope Phalaropus fulicarius. Four species were added to category E: Bahama Pintail Anas bahamensis, Rosy-billed Pochard Netta peposaca, Harris’s Hawk Parabuteo unicinctus and Alexandrine Parakeet Psittacula eupatria. The list of birds recorded in Slovenia (as of 31 Dec 2015) contains 386 species (371 in category A, 6 in category B, 9 exclusively in category C; 4 species are both in categories A and C). Category D contains 6 species, while category E contains 38, two of which are classified into subcategory E*. These two categories are not part of the list.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"25 1","pages":"69 - 78"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influx of Red-footed Falcons Falco vespertinus in Slovenia in spring 2015","authors":"J. Hanžel","doi":"10.1515/acro-2015-0012","DOIUrl":"https://doi.org/10.1515/acro-2015-0012","url":null,"abstract":"The Red-footed Falcon Falco vespertinus is widely distributed from eastern Europe to north central Asia, with its main European breeding populations (in descending order of size) in Russia, Ukraine, Romania and Hungary (Ferguson-Lees & Christie 2001, BirdLife International 2015). The species is a long distance migrant wintering in southern Africa from Angola and Zambia to northern South Africa (Ferguson-Lees & Christie 2001). It is known to migrate in a loop: flying along a broad front through the eastern Mediterranean in autumn and following a more westerly route in spring (Glutz von Blotzheim et al. 1989). Influxes of the species into western and central Europe are known to occur particularly in spring, when migration coincides with anticyclonic systems in eastern Europe (FergusonLees & Christie 2001). Meteorological conditions further south along the species' migration route could conceivably also play a role in these influxes, even though this hypothesis remains unproven. Recent large spring influxes took place in 2008 (Mayer & Kratzer 2009, Volet & Gerber 2009) and 1992 (Hagemeijer 1994, Nightingale & Allsopp 1994). In Slovenia, the species occurs regularly on migration, much more commonly in spring than in autumn (Tome et al. 2005, Bordjan & Božič 2009, Bordjan 2012). The spring migration of the species lasts from late April to early June with a peak in mid-May (Tome et al. 2005, Bordjan 2012). Based on limited data, the number of migrating Red-footed Falcons through Slovenia in spring was estimated at 500–2000 individuals (Denac et al. 2011). The highest numbers were observed at Lake Cerknica and Ljubljansko barje with highest daily counts of 1000 (Bordjan 2010) and 42 individuals (Tome et al. 2005), respectively. The seasonal totals are estimated at 300–1500 individuals","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"36 1","pages":"179 - 183"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abundance and distribution of the Great Grey Shrike Lanius excubitor at Ljubljansko barje (Central Slovenia) in winters 2008/09, 2011/12 and 2012/13","authors":"Urška Koce","doi":"10.1515/acro-2015-0009","DOIUrl":"https://doi.org/10.1515/acro-2015-0009","url":null,"abstract":"Results of the survey of wintering Great Grey Shrikes Lanius excubitor at Ljubljansko barje in winters 2008/09, 2011/12 and 2012/13 are presented. The census was conducted by 30-60 volunteers of the Ljubljana branch of DOPPS - BirdLife Slovenia. The survey area was divided into 13-20 census plots. Locations of Great Grey Shrikes, types of structures on which the shrikes perched, and heights of their perches were recorded. The numbers of wintering Great Grey Shrikes at Ljubljansko barje were estimated at 57 (2008/09), 51 (2011/12) and 67 (2012/13) individuals. Crude densities in the census area were 4.2, 3.7 and 4.9 individuals/10 km2, whereas maximal local densities reached 15.0, 14.6 and 14.8 individuals/10 km2. The analysis of the actual land use revealed higher densities of Great Grey Shrikes in the areas with a higher proportion of grassland and a lower proportion of arable fields and gardens in winter 2008/09; there was no such gradient in the other two winters. Great Grey Shrikes were most often observed in treetops, on powerlines and bushes in winters 2011/12 and 2012/13, while in winter 2008/09 they were more often observed on herbaceous stems and less often on powerlines. Moreover, the heights of their perches were lower than in the other two winters.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"36 1","pages":"133 - 144"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bird ringing in Slovenia in 2014 and results of the first telemetry study of an African migrant","authors":"A. Vrezec, Dare Fekonja, Katarina Denac","doi":"10.1515/acro-2015-0010","DOIUrl":"https://doi.org/10.1515/acro-2015-0010","url":null,"abstract":"In 2014, 162 bird species were recorded during the bird ringing activities in Slovenia. Of 155 species, 62,275 birds were ringed, and 107 recoveries of birds ringed in Slovenia and found abroad, 148 foreign recoveries in Slovenia and 1395 local recoveries were recorded. The most frequently ringed species were Blackcap Sylvia atricapilla and Great Tit Parus major. As far as ringed nestlings are concerned, Great Tits and Barn Swalllows Hirundo rustica predominated. Considering the recoveries ringed of found birds abroad, the commonest were Black-headed Gulls Chroicocephalus ridibundus and Mute Swans Cygnus olor. The farthest recovery was a Barn Swallow Hirundo rustica found in the Democratic Republic of Congo (5171 km away). Among the more interesting finds was also the so far southernmost recovery of a Sand Martin Riparia riparia found in Israel. Let us also mention the first recovery of a Corncrake Crex crex, which bred and was ringed in 2013 at Planinsko polje (central Slovenia) and was found in the 2014 breeding season in the Czech Republic. Among rare species, two Little Buntings Emberiza pusilla were caught and ringed. After nine years, the Roller Coracias garrulus bred again in Slovenia in 2014 and its nestlings were ringed. The paper also brings the description of the migration route of the first African migrant, the Black Stork Ciconia nigra, marked with a GPS/GSM telemetric device, which migrated across the Adriatic Sea, Sicily and Sahara to Nigeria.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"36 1","pages":"145 - 172"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2015-0010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selection of foraging habitat and diet of the Hoopoe Upupa epops in the mosaic-like cultural landscape of Goričko (NE Slovenia)","authors":"Mojca Podletnik, D. Denac","doi":"10.1515/acro-2015-0008","DOIUrl":"https://doi.org/10.1515/acro-2015-0008","url":null,"abstract":"In 2012 and 2013, the selection of foraging habitats and the diet of the Hoopoe Upupa epops were studied in the Goričko area, where a significant population decline of the species has been recorded in the past 15 years. Goričko is an area with a well-preserved traditional mosaic-like agricultural landscape very rich in biodiversity which, however, is disappearing. The diet was determined using automatic camera recordings of prey brought to chicks by parents. Mole crickets Gryllotalpa gryllotalpa were the most dominant prey (35.4% frequency and 81.3% biomass of prey), followed by Scarab beetles larvae Scarabaeidae, caterpillars Lepidoptera larvae and True flies Diptera. Feeding frequency was highest in the period of most intensive chick growth (between 8 and 21 days of age). Selection of foraging habitat was researched by observation of birds during foraging. Hoopoes foraged mostly in mown meadows and grassy courtyards and, to a lesser extent, on sandy cart tracks and road edges. These habitats were characterized by low vegetation and patches of bare ground that enabled Hoopoes to forage efficiently. Home range size was determined using minimum convex polygons. The maximum home range size was between 42.9 and 57.7 ha, while the percentage of foraging habitats within the home range did not exceed 18%. Based on our results, we propose the following measures for effective Hoopoe conservation in the area: maintaining the present range of existing unimproved meadows, stopping the conversion of meadows into fields, restoring fields to meadows, prohibiting the use of pesticides targeting Mole crickets.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"36 1","pages":"109 - 132"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2015-0008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}