Summary Results of the survey carried out in the territories of Tawny Owl Strix aluco in Ljubljana urban forests (Tivoli, Rožnik and Šišenski hrib Nature Park and Golovec Hill) were compared with the species territory density in non-urban forest of Mt. Krim. Surveys were performed with the point count method using playback in the springs of 2002 and 2016. The density established at Golovec Hill was 9.3 territories / 10 km2, while in Tivoli, Rožnik and Šišenski hrib Nature Park it reached 10.4 territories / 10 km2, which was higher than at Mt. Krim (4.1-5.8 territories / 10 km2), although densities between sites were not statistically different. Based on our surveys, the estimated population size of the urban Tawny Owl in Ljubljana would consist of 57 to 65 pairs. Our results suggest that the Tawny Owl can adapt well to the living conditions in the city urban forests and indicate the importance of the forest patches in urban areas.
{"title":"Breeding density of the Tawny Owl Strix aluco in urban forests of Ljubljana City (Central Slovenia)","authors":"Tjaša Pršin, D. Kušar, T. Obermajer, A. Vrezec","doi":"10.1515/acro-2017-0003","DOIUrl":"https://doi.org/10.1515/acro-2017-0003","url":null,"abstract":"Summary Results of the survey carried out in the territories of Tawny Owl Strix aluco in Ljubljana urban forests (Tivoli, Rožnik and Šišenski hrib Nature Park and Golovec Hill) were compared with the species territory density in non-urban forest of Mt. Krim. Surveys were performed with the point count method using playback in the springs of 2002 and 2016. The density established at Golovec Hill was 9.3 territories / 10 km2, while in Tivoli, Rožnik and Šišenski hrib Nature Park it reached 10.4 territories / 10 km2, which was higher than at Mt. Krim (4.1-5.8 territories / 10 km2), although densities between sites were not statistically different. Based on our surveys, the estimated population size of the urban Tawny Owl in Ljubljana would consist of 57 to 65 pairs. Our results suggest that the Tawny Owl can adapt well to the living conditions in the city urban forests and indicate the importance of the forest patches in urban areas.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"38 1","pages":"31 - 35"},"PeriodicalIF":0.0,"publicationDate":"2017-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43432583","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}
Abstract In 2015, 170 bird species were recorded during bird ringing activities in Slovenia. We ringed 73,371 birds belonging to 162 species, there were 132 foreign recoveries of birds ringed in Slovenia, 120 recoveries of birds ringed abroad and found in Slovenia, as well as 1964 local recoveries. The most frequently ringed species were Blackcap Sylvia atricapilla and Great Tit Parus major. In ringed nestlings, Great Tits and Tree Sparrows Passer montanus predominated. In 2015, the first preliminary ringing of Scops Owls Otus scops during migration took place, resulting in the highest number of Scops Owls ringed so far. Concerning recoveries of birds ringed in Slovenia and later recorded abroad and birds ringed abroad and later recorded in Slovenia, the commonest were Mute Swans Cygnus olor and Black-headed Gulls Chroicocephalus ridibundus. The longest-distance recovery concerned a Reed Bunting Emberiza schoeniculus found in Sweden (2,144 km away). Among the interesting finds were also the first finds of ringed Pygmy Cormorants Microcarbo pygmeus so far from breeding sites in Hungary. Among rare species, Yellow-browed Warbler Phylloscopus inornatus, Spanish Sparrow Passer hispaniolensis and a pair of Parrot Crossbills Loxia pytyopsittacus were caught and ringed, the latter for the very first time in Slovenia after more than 100 years. An overview of records of the Parrot Crossbill is given herein, as well as analysis of irruptive years of the Red Crossbills Loxia curvirostra between 1980 and 2015, when the probability of boreal Crossbill species occurrence is the highest. According to the ringers’ data, the irruptive years of Red Crossbills in Slovenia were 1984, 1985, 2007, 2008, 2010, 2011 and 2012. The article points to the probability that Parrot Crossbills have been overlooked in the past, since larger specimens of Crossbills were ringed mostly in irruptive years, but no specific bill measurements important for distinguishing between Parrot and Red Crossbill had been taken.
{"title":"Bird ringing in Slovenia in 2015 and the occurrence of Parrot Crossbills Loxia pytyopsittacus","authors":"A. Vrezec, Dare Fekonja","doi":"10.1515/acro-2016-0011","DOIUrl":"https://doi.org/10.1515/acro-2016-0011","url":null,"abstract":"Abstract In 2015, 170 bird species were recorded during bird ringing activities in Slovenia. We ringed 73,371 birds belonging to 162 species, there were 132 foreign recoveries of birds ringed in Slovenia, 120 recoveries of birds ringed abroad and found in Slovenia, as well as 1964 local recoveries. The most frequently ringed species were Blackcap Sylvia atricapilla and Great Tit Parus major. In ringed nestlings, Great Tits and Tree Sparrows Passer montanus predominated. In 2015, the first preliminary ringing of Scops Owls Otus scops during migration took place, resulting in the highest number of Scops Owls ringed so far. Concerning recoveries of birds ringed in Slovenia and later recorded abroad and birds ringed abroad and later recorded in Slovenia, the commonest were Mute Swans Cygnus olor and Black-headed Gulls Chroicocephalus ridibundus. The longest-distance recovery concerned a Reed Bunting Emberiza schoeniculus found in Sweden (2,144 km away). Among the interesting finds were also the first finds of ringed Pygmy Cormorants Microcarbo pygmeus so far from breeding sites in Hungary. Among rare species, Yellow-browed Warbler Phylloscopus inornatus, Spanish Sparrow Passer hispaniolensis and a pair of Parrot Crossbills Loxia pytyopsittacus were caught and ringed, the latter for the very first time in Slovenia after more than 100 years. An overview of records of the Parrot Crossbill is given herein, as well as analysis of irruptive years of the Red Crossbills Loxia curvirostra between 1980 and 2015, when the probability of boreal Crossbill species occurrence is the highest. According to the ringers’ data, the irruptive years of Red Crossbills in Slovenia were 1984, 1985, 2007, 2008, 2010, 2011 and 2012. The article points to the probability that Parrot Crossbills have been overlooked in the past, since larger specimens of Crossbills were ringed mostly in irruptive years, but no specific bill measurements important for distinguishing between Parrot and Red Crossbill had been taken.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"66 1","pages":"177 - 208"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099670","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}
Abstract In a period of 30 years (1984-2013), 1,535 White Stork pulli were ringed on nest and 1,226 nests examined in NE Slovenia. The ringing was implemented in the regions of Dravsko polje, Slovenske gorice and Pomurje. In each season, from 9 to 85 nests were examined, the great majority of them built on overhead powerline pylons. On average, 51.16 pulli or 16.66% were ringed and 40.86 or 18.91% nests visited compared to the census of fledged pulli and inventoried nests in 1999 in NE Slovenia. A total of 71 finds or 4.6% were registered and 37 rings or 52% finds read. There were 26 (36.62%) local recoveries, while in foreign countries 34 (47.88%) recoveries of Slovenian-ringed storks were made. Two of our recoveries were registered abroad prior to 1984. There were 11 (15.49%) foreign recoveries. Local recoveries (n = 26) indicate breeding relationship (mixing) between the eastern and southern Slovenian breeding populations. The longest distance of breeding was 115 km in a beeline, the shortest 62 km (n = 4). Other 12 local recoveries at 1 to 38 km from the place of hatching concerns the native NE breeding area. Young sexually mature storks search for new breeding sites only in their fourth year of age. No ringed stork returned to the native nest as a young breeder. The oldest was 14 years old. Some of them breed in the wider area of the Pannonian Plain outside Slovenia, e.g. 3 in Austria, 2 in Serbia and 1 in Croatia. One of them bred in Slovakia 463 km away. In view of the presented recoveries it has been ascertained that the storks from NE Slovenia migrate across the Pannonian Plain, the Balkans and Asia Minor, down to the South African Republic of 8,923 km in a beeline (4 recoveries), using the eastern migration route. The western migration route was not ascertained. The majority of recoveries originated from the autumn migration period, with only one recovery known from the spring migration period. No less than 23 ringed storks, particularly young ones, were killed on migration owing to collisions with overhead power lines, which indicates inappropriate system of overhead power lines construction all over Europe.
{"title":"Ringing of White Storks Ciconia ciconia in NE Slovenia during the 1984–2013 period","authors":"F. Bračko","doi":"10.1515/acro-2016-0009","DOIUrl":"https://doi.org/10.1515/acro-2016-0009","url":null,"abstract":"Abstract In a period of 30 years (1984-2013), 1,535 White Stork pulli were ringed on nest and 1,226 nests examined in NE Slovenia. The ringing was implemented in the regions of Dravsko polje, Slovenske gorice and Pomurje. In each season, from 9 to 85 nests were examined, the great majority of them built on overhead powerline pylons. On average, 51.16 pulli or 16.66% were ringed and 40.86 or 18.91% nests visited compared to the census of fledged pulli and inventoried nests in 1999 in NE Slovenia. A total of 71 finds or 4.6% were registered and 37 rings or 52% finds read. There were 26 (36.62%) local recoveries, while in foreign countries 34 (47.88%) recoveries of Slovenian-ringed storks were made. Two of our recoveries were registered abroad prior to 1984. There were 11 (15.49%) foreign recoveries. Local recoveries (n = 26) indicate breeding relationship (mixing) between the eastern and southern Slovenian breeding populations. The longest distance of breeding was 115 km in a beeline, the shortest 62 km (n = 4). Other 12 local recoveries at 1 to 38 km from the place of hatching concerns the native NE breeding area. Young sexually mature storks search for new breeding sites only in their fourth year of age. No ringed stork returned to the native nest as a young breeder. The oldest was 14 years old. Some of them breed in the wider area of the Pannonian Plain outside Slovenia, e.g. 3 in Austria, 2 in Serbia and 1 in Croatia. One of them bred in Slovakia 463 km away. In view of the presented recoveries it has been ascertained that the storks from NE Slovenia migrate across the Pannonian Plain, the Balkans and Asia Minor, down to the South African Republic of 8,923 km in a beeline (4 recoveries), using the eastern migration route. The western migration route was not ascertained. The majority of recoveries originated from the autumn migration period, with only one recovery known from the spring migration period. No less than 23 ringed storks, particularly young ones, were killed on migration owing to collisions with overhead power lines, which indicates inappropriate system of overhead power lines construction all over Europe.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"159 - 170"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099654","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}
Abstract Five hundred pellets of the Mediterranean Shag Phalacrocorax aristotelis desmarestii were collected at three roost-sites along the Slovenian coast and analysed. The diet was characterized mostly by the dominance of bottom dwelling fish species of the appropriate size. The Black Goby Gobius niger was the most dominant prey and represented the Shag’s main prey in the studied area (IRI% = 64.0). The results of the study confirm that the Mediterranean Shag preys mainly on fish species which are without commercial value for local fisheries.
{"title":"The diet of the Mediterranean Shag Phalacrocorax aristotelis desmarestii roosting along the Slovenian coast","authors":"L. Lipej, B. Mavrič, R. Odorico, Urška Koce","doi":"10.1515/acro-2016-0008","DOIUrl":"https://doi.org/10.1515/acro-2016-0008","url":null,"abstract":"Abstract Five hundred pellets of the Mediterranean Shag Phalacrocorax aristotelis desmarestii were collected at three roost-sites along the Slovenian coast and analysed. The diet was characterized mostly by the dominance of bottom dwelling fish species of the appropriate size. The Black Goby Gobius niger was the most dominant prey and represented the Shag’s main prey in the studied area (IRI% = 64.0). The results of the study confirm that the Mediterranean Shag preys mainly on fish species which are without commercial value for local fisheries.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"151 - 158"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099860","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}
Scopoli's Shearwater Calonectris diomedea breeds in the Mediterranean (BirdLife International 2016a), with isolated cases of breeding recorded on the French Atlantic coast (Mays et al. 2006). Following a recent reassessment at its largest colony (Zembra Island, Tunisia), the global population is estimated at 141,000–223,000 breeding pairs (Defos du Rau et al. 2015, BirdLife International 2016a). Based on limited data, the population appears to be in slight decline, 2% over three generations, but is still evaluated as “Least Concern” (Carboneras et al. 2013, BirdLife International 2016a). The majority of the population leaves the Mediterranean to winter in the Atlantic Ocean, mainly in three areas: the Benguela and Agulhas Currents, the Brazilian Current and the Canary Current (Ristow et al. 2000, Camphuysen & van der Meer 2001, González-Solís et al. 2007, Péron et al. 2012). The autumn passage to the Atlantic takes place between mid-October and late-November, spring passage in the reverse direction between late February and early April (Ramos et al. 2009). Until recently Scopoli's Shearwater, first described by Joannes Antonius Scopoli in 1769, was considered the nominotypical subspecies of the polytypic Cory's Shearwater, together with Calonectris (diomedea) borealis which breeds mainly in the Atlantic Ocean. Field characters to differentiate the two subspecies were described by Gutiérrez (1998) and the split first proposed by Sangster et al. (1999) based on differences in molecular data, morphology and vocalization. The decision was not universally accepted at the time, but is now more widely adopted (Sangster et al. 2012, BirdLife International 2016a). Because Scopoli was based in Carniola for a significant part of his professional life, his species descriptions are of particular interest for Slovenian ornithologists. The species is named Procellaria diomedea (Scopoli 1769) and Scopoli refers to Linnaeus's “Diomedea (exulans)” (Linnaeus 1766) and Jonston's “Diomedea” (Jonstonus 1650). He proceeds to briefly describe the species without giving
Scopoli's Shearwater Calonectris diomedea在地中海繁殖(国际BirdLife International 2016a)，在法国大西洋沿岸有繁殖的孤立案例记录(Mays et al. 2006)。在最近对其最大的种群(突尼斯Zembra岛)进行重新评估后，全球种群数量估计为141,000-223,000对繁殖对(Defos du Rau et al. 2015, BirdLife International 2016a)。根据有限的数据，种群数量似乎略有下降，在三代内下降2%，但仍被评估为“最不关注”(Carboneras et al. 2013, BirdLife International 2016a)。大多数种群离开地中海到大西洋过冬，主要分布在三个区域:本格拉和阿古拉斯海流、巴西海流和加那利海流(Ristow et al. 2000, Camphuysen & van der Meer 2001, González-Solís et al. 2007, p等人2012)。到大西洋的秋季通道发生在10月中旬到11月下旬之间，春季通道发生在2月下旬到4月初之间(Ramos et al. 2009)。直到最近，由Joannes Antonius Scopoli于1769年首次描述的Scopoli's Shearwater被认为是多型Cory's Shearwater的命名典型亚种，与主要在大西洋繁殖的Calonectris (diomedea) borealis一起。gutisamurez(1998)描述了区分两个亚种的田间性状，Sangster等人(1999)基于分子数据、形态和发声的差异首次提出了区分。这一决定在当时并没有被普遍接受，但现在被更广泛地采用(Sangster et al. 2012, BirdLife International 2016a)。因为Scopoli在卡尼奥拉度过了他职业生涯的重要部分，所以他的物种描述对斯洛文尼亚的鸟类学家特别感兴趣。该物种被命名为Procellaria diomedea (Scopoli 1769)， Scopoli指的是林奈的“diomedea (exulans)”(林奈1766)和琼斯顿的“diomedea”(Jonstonus 1650)。他接着简要地描述了这个物种，但没有给出答案
{"title":"First record of Scopoli’s Shearwater Calonectris diomedea in Slovenia","authors":"J. Hanžel","doi":"10.1515/acro-2016-0014","DOIUrl":"https://doi.org/10.1515/acro-2016-0014","url":null,"abstract":"Scopoli's Shearwater Calonectris diomedea breeds in the Mediterranean (BirdLife International 2016a), with isolated cases of breeding recorded on the French Atlantic coast (Mays et al. 2006). Following a recent reassessment at its largest colony (Zembra Island, Tunisia), the global population is estimated at 141,000–223,000 breeding pairs (Defos du Rau et al. 2015, BirdLife International 2016a). Based on limited data, the population appears to be in slight decline, 2% over three generations, but is still evaluated as “Least Concern” (Carboneras et al. 2013, BirdLife International 2016a). The majority of the population leaves the Mediterranean to winter in the Atlantic Ocean, mainly in three areas: the Benguela and Agulhas Currents, the Brazilian Current and the Canary Current (Ristow et al. 2000, Camphuysen & van der Meer 2001, González-Solís et al. 2007, Péron et al. 2012). The autumn passage to the Atlantic takes place between mid-October and late-November, spring passage in the reverse direction between late February and early April (Ramos et al. 2009). Until recently Scopoli's Shearwater, first described by Joannes Antonius Scopoli in 1769, was considered the nominotypical subspecies of the polytypic Cory's Shearwater, together with Calonectris (diomedea) borealis which breeds mainly in the Atlantic Ocean. Field characters to differentiate the two subspecies were described by Gutiérrez (1998) and the split first proposed by Sangster et al. (1999) based on differences in molecular data, morphology and vocalization. The decision was not universally accepted at the time, but is now more widely adopted (Sangster et al. 2012, BirdLife International 2016a). Because Scopoli was based in Carniola for a significant part of his professional life, his species descriptions are of particular interest for Slovenian ornithologists. The species is named Procellaria diomedea (Scopoli 1769) and Scopoli refers to Linnaeus's “Diomedea (exulans)” (Linnaeus 1766) and Jonston's “Diomedea” (Jonstonus 1650). He proceeds to briefly describe the species without giving","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"227 - 230"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099720","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}
Januarsko štetje vodnih ptic (IWC) poteka v Sloveniji od leta 1988, leta 1997 pa je bilo prvič zastavljeno kot celosten, koordiniran in standardiziran popis vodnih ptic na ozemlju celotne Slovenije (Štumberger 1997). Od takrat naprej štetje pokriva vse večje reke, Obalo in večino pomembnejših stoječih vodnih teles v državi (Štumberger 1997, 1998, 1999, 2000, 2001, 2002, 2005, Božič 2005, 2006, 2007, 2008a, 2008b, 2010, 2011, 2012, 2013, 2014, 2015). K temu sta pripomogla predvsem dobra organizacija in veliko število sodelujočih prostovoljnih popisovalcev. V poročilu so predstavljeni rezultati januarskega štetja vodnih ptic leta 2016, ki je v podobnem obsegu potekalo že dvajsetič zapored. Leta 2016 smo vodne ptice šteli 16. in 17. januarja. Organizacija, potek, uporabljena metoda štetja in popisni obrazci so bili takšni kot leta 1997 (Štumberger 1997). Pri obdelavi in predstavitvi rezultatov smo upoštevali tudi nekatere podatke, zbrane zunaj organiziranega štetja, vendar največ do sedem dni pred ali po koncu tedna, predvidenega za štetje. Kormorane Phalacrocorax carbo smo na števnih območjih Mure, Drave in Savinje sistematično posebej šteli na znanih in domnevnih skupinskih prenočiščih, prav tako velike žagarje Mergus merganser na števnih območjih Drave in Savinje. Na skupinskih prenočiščih smo šteli tudi pritlikave kormorane P. pygmeus, zvonce Bucephala clangula in galebe Laridae na števnem območju Drave. Mokože Rallus aquaticus smo na ptujskih studenčnicah in potoku Črnec (Murska ravan) sočasno s štetjem drugih vodnih ptic popisali s pomočjo predvajanja posnetka oglašanja. Metoda je podrobneje opisana v Božič (2002). V štetje so bile tako kot vsako leto vključene vrste iz naslednjih skupin ptic: plovci Anatidae, slapniki Gaviidae, kormorani Phalacrocoracidae, čaplje Ardeidae, štorklje Ciconiidae, plamenci Phoenicopteridae, ponirki Podicipedidae, tukalice Rallidae, pobrežniki Charadriiformes ter belorepec Haliaeetus albicilla, rjavi lunj Circus aeruginosus, močvirska uharica Asio Acrocephalus 37 (170/171): 209–219, 2016 10.1515/acro-2016-0012
{"title":"Results of the January 2016 waterbird census in Slovenia","authors":"Luka Božič","doi":"10.1515/acro-2016-0012","DOIUrl":"https://doi.org/10.1515/acro-2016-0012","url":null,"abstract":"Januarsko štetje vodnih ptic (IWC) poteka v Sloveniji od leta 1988, leta 1997 pa je bilo prvič zastavljeno kot celosten, koordiniran in standardiziran popis vodnih ptic na ozemlju celotne Slovenije (Štumberger 1997). Od takrat naprej štetje pokriva vse večje reke, Obalo in večino pomembnejših stoječih vodnih teles v državi (Štumberger 1997, 1998, 1999, 2000, 2001, 2002, 2005, Božič 2005, 2006, 2007, 2008a, 2008b, 2010, 2011, 2012, 2013, 2014, 2015). K temu sta pripomogla predvsem dobra organizacija in veliko število sodelujočih prostovoljnih popisovalcev. V poročilu so predstavljeni rezultati januarskega štetja vodnih ptic leta 2016, ki je v podobnem obsegu potekalo že dvajsetič zapored. Leta 2016 smo vodne ptice šteli 16. in 17. januarja. Organizacija, potek, uporabljena metoda štetja in popisni obrazci so bili takšni kot leta 1997 (Štumberger 1997). Pri obdelavi in predstavitvi rezultatov smo upoštevali tudi nekatere podatke, zbrane zunaj organiziranega štetja, vendar največ do sedem dni pred ali po koncu tedna, predvidenega za štetje. Kormorane Phalacrocorax carbo smo na števnih območjih Mure, Drave in Savinje sistematično posebej šteli na znanih in domnevnih skupinskih prenočiščih, prav tako velike žagarje Mergus merganser na števnih območjih Drave in Savinje. Na skupinskih prenočiščih smo šteli tudi pritlikave kormorane P. pygmeus, zvonce Bucephala clangula in galebe Laridae na števnem območju Drave. Mokože Rallus aquaticus smo na ptujskih studenčnicah in potoku Črnec (Murska ravan) sočasno s štetjem drugih vodnih ptic popisali s pomočjo predvajanja posnetka oglašanja. Metoda je podrobneje opisana v Božič (2002). V štetje so bile tako kot vsako leto vključene vrste iz naslednjih skupin ptic: plovci Anatidae, slapniki Gaviidae, kormorani Phalacrocoracidae, čaplje Ardeidae, štorklje Ciconiidae, plamenci Phoenicopteridae, ponirki Podicipedidae, tukalice Rallidae, pobrežniki Charadriiformes ter belorepec Haliaeetus albicilla, rjavi lunj Circus aeruginosus, močvirska uharica Asio Acrocephalus 37 (170/171): 209–219, 2016 10.1515/acro-2016-0012","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"209 - 219"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099677","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}
Abstract In 2015, we used the same method as in the 1989-1996 period to count calling males of the Common Quail Coturnix coturnix in selected 1x1 km squares of Ljubljansko barje (central Slovenia). We counted 39 males, which is 87% less compared to the survey 20 years ago. Quails were found in 56% fewer squares. Since Quail populations are known to fluctuate greatly between years, we think that the most realistic long-term estimate for population decline would be somewhere between 50 to 90%. We detected that within only one week males stopped calling in some squares, while in others they began calling although they had not been detected there before, indicating possible relocations. This dynamics should be considered when designing a population monitoring protocol for the Quail.
{"title":"Population size of the Common Quail Coturnix coturnix at Ljubljansko barje decreased in the last twenty years by half, perhaps even (much?) more","authors":"D. Tome, A. Vrezec, Špela Ambrožič, Andrej Kapla","doi":"10.1515/acro-2016-0010","DOIUrl":"https://doi.org/10.1515/acro-2016-0010","url":null,"abstract":"Abstract In 2015, we used the same method as in the 1989-1996 period to count calling males of the Common Quail Coturnix coturnix in selected 1x1 km squares of Ljubljansko barje (central Slovenia). We counted 39 males, which is 87% less compared to the survey 20 years ago. Quails were found in 56% fewer squares. Since Quail populations are known to fluctuate greatly between years, we think that the most realistic long-term estimate for population decline would be somewhere between 50 to 90%. We detected that within only one week males stopped calling in some squares, while in others they began calling although they had not been detected there before, indicating possible relocations. This dynamics should be considered when designing a population monitoring protocol for the Quail.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"171 - 176"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099665","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}
Abstract In 2008, a coordinated census of Jackdaw Corvus monedula was carried out to assess breeding population, distribution and nest site selection in Slovenia. Data collection continued for unsurveyed areas in the 2009-2011 period, including information on former colonies and threats. A total of 663-794 Jackdaw pairs were recorded at 86 sites, while total Slovene breeding population was estimated to be in the range of 700-900 pairs. Over one third of pairs were recorded in Central Slovenia, notably the largest city Ljubljana (20.8%), followed by almost a quarter in the Podravje region. Most colonies numbered between 2 and 5 pairs, the largest occupying the Bežigrad district of Ljubljana (82-87 pairs). Large-scale density in geographically more or less uniform areas ranged from 3.65 pairs/10 km2 in the Sava plain to 0.15 pairs/10 km2 in mostly mountainous area in northern Slovenia. The majority of Jackdaws selected buildings for nesting (82.2% of pairs), while nesting in trees occurred less frequently (14.7%) and was almost entirely confined to the two easternmost regions of Slovenia. Nesting in cliffs was recorded at just two sites in Slovene Istria (3.1%). Average colony size differed significantly in relation to nest site type, with colonies in rock walls being on average the largest (median = 9.5 pairs), followed by colonies on buildings (6) and those in trees the smallest (3). Among pairs nesting on buildings, multi-storey residential buildings predominated (34.2%). A substantial percentage of population nested also on churches and tower blocks (14.4% and 13.5%, respectively). The highest percentage of pairs utilised holes in roofs (26.9%), followed by eaves (18.0%) and chimney pots (14.7%). Tree-nesting pairs occupied mostly small woods situated in open agricultural landscape. The most commonly used tree species was Beech Fagus sylvatica (53.1% of pairs) which hosted 14 of the total 16 forest colonies. For Jackdaws nesting in urban parks and avenues, plane trees Platanus sp. were the most important (30.6% of pairs). Their population stronghold was in lowlands, with 88.1% of pairs recorded at elevations under 400 m and the highest living colony in Slovenia at 578 m a.s.l. Jackdaws occurred on at least 54 specific sites in the past but became extinct there or declined severely by the time of this study. A minimum of 217-254 pairs were estimated lost at these sites, constituting a decline of 24% in c. 10-20 years. According to the IUCN criteria, Jackdaw would qualify as Vulnerable (VU) on the Red List of Slovenia. The commonest known cause of extinction/decline is renovation of buildings, a threat that is projected to escalate in the near future.
{"title":"Numbers, distribution and nest site characteristics of Jackdaw Corvus monedula in Slovenia and its conservation status","authors":"Luka Božič","doi":"10.1515/acro-2016-0007","DOIUrl":"https://doi.org/10.1515/acro-2016-0007","url":null,"abstract":"Abstract In 2008, a coordinated census of Jackdaw Corvus monedula was carried out to assess breeding population, distribution and nest site selection in Slovenia. Data collection continued for unsurveyed areas in the 2009-2011 period, including information on former colonies and threats. A total of 663-794 Jackdaw pairs were recorded at 86 sites, while total Slovene breeding population was estimated to be in the range of 700-900 pairs. Over one third of pairs were recorded in Central Slovenia, notably the largest city Ljubljana (20.8%), followed by almost a quarter in the Podravje region. Most colonies numbered between 2 and 5 pairs, the largest occupying the Bežigrad district of Ljubljana (82-87 pairs). Large-scale density in geographically more or less uniform areas ranged from 3.65 pairs/10 km2 in the Sava plain to 0.15 pairs/10 km2 in mostly mountainous area in northern Slovenia. The majority of Jackdaws selected buildings for nesting (82.2% of pairs), while nesting in trees occurred less frequently (14.7%) and was almost entirely confined to the two easternmost regions of Slovenia. Nesting in cliffs was recorded at just two sites in Slovene Istria (3.1%). Average colony size differed significantly in relation to nest site type, with colonies in rock walls being on average the largest (median = 9.5 pairs), followed by colonies on buildings (6) and those in trees the smallest (3). Among pairs nesting on buildings, multi-storey residential buildings predominated (34.2%). A substantial percentage of population nested also on churches and tower blocks (14.4% and 13.5%, respectively). The highest percentage of pairs utilised holes in roofs (26.9%), followed by eaves (18.0%) and chimney pots (14.7%). Tree-nesting pairs occupied mostly small woods situated in open agricultural landscape. The most commonly used tree species was Beech Fagus sylvatica (53.1% of pairs) which hosted 14 of the total 16 forest colonies. For Jackdaws nesting in urban parks and avenues, plane trees Platanus sp. were the most important (30.6% of pairs). Their population stronghold was in lowlands, with 88.1% of pairs recorded at elevations under 400 m and the highest living colony in Slovenia at 578 m a.s.l. Jackdaws occurred on at least 54 specific sites in the past but became extinct there or declined severely by the time of this study. A minimum of 217-254 pairs were estimated lost at these sites, constituting a decline of 24% in c. 10-20 years. According to the IUCN criteria, Jackdaw would qualify as Vulnerable (VU) on the Red List of Slovenia. The commonest known cause of extinction/decline is renovation of buildings, a threat that is projected to escalate in the near future.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"37 1","pages":"123 - 150"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099804","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}
Summary This report by the Slovenian Rarities Committee presents records of rare bird species in Slovenia in 2016, 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 2015. 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. Two new species, Scopoli’s Shearwater Calonectris diomedea and Arctic Tern Sterna paradisaea, were added to Category A. Other notable observations were the second record of Lesser Yellowlegs Tringa flavipes, third and fourth records of Pallid Swift Apus pallidus, fifth to seventh records of Long-legged Buzzard Buteo rufinus and the sixth and seventh records of Gannet Morus bassanus. Twelve records of Pallid Harrier Circus macrourus are an all-time annual high. Among Category E species, the Hooded Merganser Lophodytes cucullatus was recorded for the second time. The list of birds recorded in Slovenia (as of 31 Dec 2016) contains 388 species (373 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.
{"title":"Rare birds in Slovenia in 2016 – Slovenian Rarities Committee Report","authors":"J. Hanžel","doi":"10.1515/acro-2017-0002","DOIUrl":"https://doi.org/10.1515/acro-2017-0002","url":null,"abstract":"Summary This report by the Slovenian Rarities Committee presents records of rare bird species in Slovenia in 2016, 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 2015. 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. Two new species, Scopoli’s Shearwater Calonectris diomedea and Arctic Tern Sterna paradisaea, were added to Category A. Other notable observations were the second record of Lesser Yellowlegs Tringa flavipes, third and fourth records of Pallid Swift Apus pallidus, fifth to seventh records of Long-legged Buzzard Buteo rufinus and the sixth and seventh records of Gannet Morus bassanus. Twelve records of Pallid Harrier Circus macrourus are an all-time annual high. Among Category E species, the Hooded Merganser Lophodytes cucullatus was recorded for the second time. The list of birds recorded in Slovenia (as of 31 Dec 2016) contains 388 species (373 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":"38 1","pages":"21 - 30"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099728","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}
Anastasios Bounas, M. Panuccio, A. Evangelidis, K. Sotiropoulos, C. Barboutis
Abstract We examined ringing recovery data of the Lesser Kestrel Falco naumanni in order to analyse its migration patterns and philopatry rates in Eastern Europe. In addition, we extracted counts of migrating birds from online databases and studied the use of the flyway as well as the phenology of both spring and autumn migrations through Greece. Birds appeared to migrate in the same mean direction in spring and autumn through the Italian and Balkan Peninsulas. During spring, movements took place on a broad front from March until mid- May with a peak in mid-April; in autumn, birds migrated through Greece on a narrower front from early August to early October, with most of individuals passing through Greece in mid-September. Finally, philopatry rates were higher for adults, while juvenile birds dispersed more often and at longer distances, up to 974 km away. Our results on migration patterns generally agree with those in other studies, but we found some evidence of long-distance premigratory movements towards mainland Greece that could also shape the narrower front migration in autumn. In addition, long distance dispersal movements of juveniles in southeastern Europe, where Lesser Kestrel populations show a fragmented distribution, could facilitate gene flow between populations, thus avoiding the negative effects of mating with genetically similar individuals.
{"title":"The Migration of the Lesser Kestrel Falco naumanni in Eastern Europe - A Ringing Recovery and Direct Observation Approach","authors":"Anastasios Bounas, M. Panuccio, A. Evangelidis, K. Sotiropoulos, C. Barboutis","doi":"10.1515/acro-2016-0002","DOIUrl":"https://doi.org/10.1515/acro-2016-0002","url":null,"abstract":"Abstract We examined ringing recovery data of the Lesser Kestrel Falco naumanni in order to analyse its migration patterns and philopatry rates in Eastern Europe. In addition, we extracted counts of migrating birds from online databases and studied the use of the flyway as well as the phenology of both spring and autumn migrations through Greece. Birds appeared to migrate in the same mean direction in spring and autumn through the Italian and Balkan Peninsulas. During spring, movements took place on a broad front from March until mid- May with a peak in mid-April; in autumn, birds migrated through Greece on a narrower front from early August to early October, with most of individuals passing through Greece in mid-September. Finally, philopatry rates were higher for adults, while juvenile birds dispersed more often and at longer distances, up to 974 km away. Our results on migration patterns generally agree with those in other studies, but we found some evidence of long-distance premigratory movements towards mainland Greece that could also shape the narrower front migration in autumn. In addition, long distance dispersal movements of juveniles in southeastern Europe, where Lesser Kestrel populations show a fragmented distribution, could facilitate gene flow between populations, thus avoiding the negative effects of mating with genetically similar individuals.","PeriodicalId":53560,"journal":{"name":"Acrocephalus","volume":"356 1","pages":"49 - 56"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/acro-2016-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67099056","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}
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