Pub Date : 2023-10-27DOI: 10.1080/03078698.2023.2262804
Joop Jukema, Henk van de Wetering, Jorge S. Gutiérrez, Theunis Piersma
{"title":"Slight sexual dimorphism in tail-fork depth of Common Swifts <i>Apus apus</i>","authors":"Joop Jukema, Henk van de Wetering, Jorge S. Gutiérrez, Theunis Piersma","doi":"10.1080/03078698.2023.2262804","DOIUrl":"https://doi.org/10.1080/03078698.2023.2262804","url":null,"abstract":"","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"18 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136317543","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}
Pub Date : 2022-08-03Epub Date: 2022-06-13DOI: 10.7748/ns.2022.e11879
Janet Holt
The assisted dying debate is complex, with confusion over definitions and the stance taken by professional bodies. It can also be challenging to make sense of the claims made by those who support changes in the law regarding assisted dying. End of life care is an important aspect of a nurse's role and therefore understanding the ethical issues arising from the debate is useful for nurses in clinical practice. This article outlines the legal position in the UK and the bills currently before the Westminster and Scottish parliaments proposing changes in the law. It also considers major ethical issues arising from the debate, along with the nurse's role in caring for patients requesting assisted dying.
{"title":"Ethical issues arising from the assisted dying debate.","authors":"Janet Holt","doi":"10.7748/ns.2022.e11879","DOIUrl":"10.7748/ns.2022.e11879","url":null,"abstract":"<p><p>The assisted dying debate is complex, with confusion over definitions and the stance taken by professional bodies. It can also be challenging to make sense of the claims made by those who support changes in the law regarding assisted dying. End of life care is an important aspect of a nurse's role and therefore understanding the ethical issues arising from the debate is useful for nurses in clinical practice. This article outlines the legal position in the UK and the bills currently before the Westminster and Scottish parliaments proposing changes in the law. It also considers major ethical issues arising from the debate, along with the nurse's role in caring for patients requesting assisted dying.</p>","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"32 1","pages":"28-34"},"PeriodicalIF":0.0,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86254992","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2023.2207035
Samuel Langlois Lopez, N. Isaksson, S. Fraser, E. Masden
SUMMARY During field studies, seabirds are typically caught in the breeding season because they are attached to a nesting site, which allows much closer approach by researchers. This contributes to seasonal and age-class bias in bio-logging studies because only breeding birds are caught. Some species such as the European Shag Gulosus aristotelis present opportunities to capture them outside of the breeding season. We trialed the use of mist and whoosh nets to capture European Shags in Shetland, UK, in September 2021. A total of 16 individuals were caught using both methods, although the whoosh net was more efficient than the mist net. We showed that the capture of non-breeding European Shags is possible outside the breeding season and that such studies could provide valuable data from understudied age classes and seasons.
{"title":"Successful trial of mist nets and whoosh nets to catch non-breeding European Shags Gulosus aristotelis at a daytime roost","authors":"Samuel Langlois Lopez, N. Isaksson, S. Fraser, E. Masden","doi":"10.1080/03078698.2023.2207035","DOIUrl":"https://doi.org/10.1080/03078698.2023.2207035","url":null,"abstract":"SUMMARY During field studies, seabirds are typically caught in the breeding season because they are attached to a nesting site, which allows much closer approach by researchers. This contributes to seasonal and age-class bias in bio-logging studies because only breeding birds are caught. Some species such as the European Shag Gulosus aristotelis present opportunities to capture them outside of the breeding season. We trialed the use of mist and whoosh nets to capture European Shags in Shetland, UK, in September 2021. A total of 16 individuals were caught using both methods, although the whoosh net was more efficient than the mist net. We showed that the capture of non-breeding European Shags is possible outside the breeding season and that such studies could provide valuable data from understudied age classes and seasons.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"45 - 50"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48962556","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2023.2242052
Morgan Hughes, P. Hopwood, Matilda Dolan, Ben Dolan
ABSTRACT The Skylark Alauda arvensis is a common, yet rarely ringed species. Outside the breeding season, determining the sex of individual birds is problematic. While previous studies have provided sexually dimorphic ranges of wing length, those based on accurate DNA sexing focus on Continental populations, which are subject to seasonal influxes of migrants. In Britain, Skylark is largely a sedentary species, and Continental guidelines on in-the-hand sexing might be inappropriate. Here we present a comparative analysis of morphometrics and DNA sexing for 137 individual Skylarks, to assess the accuracy of using wing length to sex trapped birds. We suggest that birds with wing measurements of 107–109 mm be classified as of ‘undetermined’ sex, with those below this range being classified as female and those above as male.
{"title":"Using wing length for sexing Eurasian Skylark Alauda arvensis: examples from a British population","authors":"Morgan Hughes, P. Hopwood, Matilda Dolan, Ben Dolan","doi":"10.1080/03078698.2023.2242052","DOIUrl":"https://doi.org/10.1080/03078698.2023.2242052","url":null,"abstract":"ABSTRACT The Skylark Alauda arvensis is a common, yet rarely ringed species. Outside the breeding season, determining the sex of individual birds is problematic. While previous studies have provided sexually dimorphic ranges of wing length, those based on accurate DNA sexing focus on Continental populations, which are subject to seasonal influxes of migrants. In Britain, Skylark is largely a sedentary species, and Continental guidelines on in-the-hand sexing might be inappropriate. Here we present a comparative analysis of morphometrics and DNA sexing for 137 individual Skylarks, to assess the accuracy of using wing length to sex trapped birds. We suggest that birds with wing measurements of 107–109 mm be classified as of ‘undetermined’ sex, with those below this range being classified as female and those above as male.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"58 - 62"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43950091","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2022.2153266
I. Literák, J. Škrábal, Boris Maderič
ABSTRACT The Red Kite Milvus milvus is endemic to the western Palearctic. While the largest breeding population is in Germany, the population density decreases substantially from central to eastern Europe. In 2015, we tagged two young Red Kite females with telemetry loggers in an area with very low kite density in the northeastern part of Slovakia. One of these females failed to breed over her seven-year lifespan. After leaving her post-fledging area she never returned. During her first two years, she undertook two exploratory flights to Croatia and Romania, but remained exclusively in southwestern Slovakia and northeastern Hungary over the rest of her life. Throughout this period, she always wintered alone and no other Red Kites were ever observed in her wintering grounds. During the pre-breeding period (March–April), she remained outside the area that held breeding kite pairs, and there were no signs of breeding based on her positions during the breeding season. This seven-year-old is the oldest Red Kite floater recorded to date. Owing to the low density of Red Kite breeding pairs in Slovakia and Hungary, it is likely that she was unable to find a suitable mate prior to the beginning of the breeding season. In such areas, the role of floaters may prove critical for the persistence of low-density Red Kite populations.
{"title":"A lifelong floater: the Red Kite female that never met a mate","authors":"I. Literák, J. Škrábal, Boris Maderič","doi":"10.1080/03078698.2022.2153266","DOIUrl":"https://doi.org/10.1080/03078698.2022.2153266","url":null,"abstract":"ABSTRACT The Red Kite Milvus milvus is endemic to the western Palearctic. While the largest breeding population is in Germany, the population density decreases substantially from central to eastern Europe. In 2015, we tagged two young Red Kite females with telemetry loggers in an area with very low kite density in the northeastern part of Slovakia. One of these females failed to breed over her seven-year lifespan. After leaving her post-fledging area she never returned. During her first two years, she undertook two exploratory flights to Croatia and Romania, but remained exclusively in southwestern Slovakia and northeastern Hungary over the rest of her life. Throughout this period, she always wintered alone and no other Red Kites were ever observed in her wintering grounds. During the pre-breeding period (March–April), she remained outside the area that held breeding kite pairs, and there were no signs of breeding based on her positions during the breeding season. This seven-year-old is the oldest Red Kite floater recorded to date. Owing to the low density of Red Kite breeding pairs in Slovakia and Hungary, it is likely that she was unable to find a suitable mate prior to the beginning of the breeding season. In such areas, the role of floaters may prove critical for the persistence of low-density Red Kite populations.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"37 - 44"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42917236","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2023.2207034
L. Hałupka, Krystyna Liersz-Żelasko, Václav Jelínek
ABSTRACT Breeding dispersal, defined as the movement of adults from one breeding locality to another, varies widely between individuals, sexes and species. Birds of the genus Acrocephalus are characterised by short breeding-dispersal distances. In this note we describe a case of a very long breeding dispersal in the Eurasian Reed Warbler A. scirpaceus. The male recorded at a nest containing a Cuckoo chick in the southeastern Czech Republic in 2013 was found two years later in southern Poland. In 2015 the male was observed singing in a territory and later with a female carrying nest material. The distance between the two breeding sites was 160 km. This is the longest breeding dispersal recorded in the species, considering the cases when breeding status at both sites was confirmed.
{"title":"Long-distance breeding dispersal in a male Eurasian Reed Warbler: an unusual case in a highly philopatric species","authors":"L. Hałupka, Krystyna Liersz-Żelasko, Václav Jelínek","doi":"10.1080/03078698.2023.2207034","DOIUrl":"https://doi.org/10.1080/03078698.2023.2207034","url":null,"abstract":"ABSTRACT Breeding dispersal, defined as the movement of adults from one breeding locality to another, varies widely between individuals, sexes and species. Birds of the genus Acrocephalus are characterised by short breeding-dispersal distances. In this note we describe a case of a very long breeding dispersal in the Eurasian Reed Warbler A. scirpaceus. The male recorded at a nest containing a Cuckoo chick in the southeastern Czech Republic in 2013 was found two years later in southern Poland. In 2015 the male was observed singing in a territory and later with a female carrying nest material. The distance between the two breeding sites was 160 km. This is the longest breeding dispersal recorded in the species, considering the cases when breeding status at both sites was confirmed.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"51 - 54"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48156752","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2023.2207036
H. Insley, David A. Philip
ABSTRACT On 4 January 2023 DAP found a dead Swallow on a farm near Auldearn, Nairnshire (57°35’N 3°52’W). The bird appeared to have been dead for three to four weeks but was in a reasonably good state of preservation, probably as a result of the prolonged period of snow and very low temperatures which had prevailed in the area during the second and third weeks of December 2022. The bird, a juvenile, appeared to have reached a stage of moult of its flight feathers which might usually have only been expected in its winter quarters.
{"title":"Advanced post-juvenile moult in a Barn Swallow Hirundo rustica found in January 2023 in northern Scotland","authors":"H. Insley, David A. Philip","doi":"10.1080/03078698.2023.2207036","DOIUrl":"https://doi.org/10.1080/03078698.2023.2207036","url":null,"abstract":"ABSTRACT On 4 January 2023 DAP found a dead Swallow on a farm near Auldearn, Nairnshire (57°35’N 3°52’W). The bird appeared to have been dead for three to four weeks but was in a reasonably good state of preservation, probably as a result of the prolonged period of snow and very low temperatures which had prevailed in the area during the second and third weeks of December 2022. The bird, a juvenile, appeared to have reached a stage of moult of its flight feathers which might usually have only been expected in its winter quarters.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"55 - 57"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48242475","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2023.2242051
J. Arizaga, Salvador Escamilla, J. Castany, Ana María Barragán, Pasqual Timor, R. Silvestre, Alberto Rebollo, Jorge Adelantado, Benjamín Pupla, Ana Cantos
ABSTRACT The main goal of this study was to describe in detail the structure and phenology of flocks of the Common Linnet (Linaria cannabina) passing through eastern Spain. Data were compiled during the spring and autumn migrations of 2019 to 2021 (excluding spring 2020), by counting and by capture for ringing. We counted 6151 flocks, comprising 17 732 birds, of which 7638 individuals were captured. The size of flocks ranged from 1 to 30 Linnets (mean ± 95% CI, 2.8 ± 0.1), with a higher proportion of solitary migrants in spring (46.8%) than in autumn (33.8%). Passage in spring peaked during the third hour after dawn, whilst in autumn this peak was just after dawn. There were more females than males (56%), probably as an indicator of latitudinal differential migration. Juveniles were significantly more abundant (c. 80%) than adults. The phenological pattern of the passage was more variable in spring than in autumn, and such variation could be useful to explore potential impacts of climate change on the migration ecology of the species.
{"title":"Flock structure and phenology of migration of the Common Linnet Linaria cannabina through eastern Spain","authors":"J. Arizaga, Salvador Escamilla, J. Castany, Ana María Barragán, Pasqual Timor, R. Silvestre, Alberto Rebollo, Jorge Adelantado, Benjamín Pupla, Ana Cantos","doi":"10.1080/03078698.2023.2242051","DOIUrl":"https://doi.org/10.1080/03078698.2023.2242051","url":null,"abstract":"ABSTRACT The main goal of this study was to describe in detail the structure and phenology of flocks of the Common Linnet (Linaria cannabina) passing through eastern Spain. Data were compiled during the spring and autumn migrations of 2019 to 2021 (excluding spring 2020), by counting and by capture for ringing. We counted 6151 flocks, comprising 17 732 birds, of which 7638 individuals were captured. The size of flocks ranged from 1 to 30 Linnets (mean ± 95% CI, 2.8 ± 0.1), with a higher proportion of solitary migrants in spring (46.8%) than in autumn (33.8%). Passage in spring peaked during the third hour after dawn, whilst in autumn this peak was just after dawn. There were more females than males (56%), probably as an indicator of latitudinal differential migration. Juveniles were significantly more abundant (c. 80%) than adults. The phenological pattern of the passage was more variable in spring than in autumn, and such variation could be useful to explore potential impacts of climate change on the migration ecology of the species.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"63 - 72"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47197299","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2022.2161004
Kane Brides, Sverrir Thorstensen, O. Einarsson, D. Boiko, Æ. Petersen, S. Auhage, Graham McElwaine, Axel Degen, B. Laubek, P. Andersen-Harild, M. Helberg, D. Vangeluwe, Jeroen Nienhuis, M. Wieloch, L. Luigujõe, J. Morkūnas, Yu. R. Bogomolova, Ivan Bogdanovich, Scott W. Petrek, K. A. Wood, E. Rees
ABSTRACT This study aims to determine the level of movement of individuals between the Icelandic and Northwest Mainland European (NWME) Whooper Swan Cygnus cygnus populations, and to assess the extent to which this interchange affects total population estimates. Ringing, resighting and recovery data for Whooper Swans ringed across Europe since the early 1900s were compiled from the EURING Data Bank, national ringing schemes and individual ringers. Birds were assigned to the biogeographical population (Icelandic or NWME) in which they were ringed. Of >18 000 Whooper Swans ringed in 17 European countries, 172 individuals (0.94%) were later found outside the nominal range of their assigned biogeographical population. The proportion of ringed swans from the Icelandic population that were subsequently found ‘out of range’ did not differ significantly from the proportion recorded for the NWME population, indicating no directional bias in population interchange. Population switching by Whooper Swans in western Europe occurs consistently, but currently at very low levels. Our results reinforce the view that such levels of population interchange are unlikely to have caused major inaccuracies or biases in the total numbers recorded during the coordinated censuses used to estimate population size.
{"title":"Interchange of individuals between two Whooper Swan Cygnus cygnus populations, and its effect on population size estimates","authors":"Kane Brides, Sverrir Thorstensen, O. Einarsson, D. Boiko, Æ. Petersen, S. Auhage, Graham McElwaine, Axel Degen, B. Laubek, P. Andersen-Harild, M. Helberg, D. Vangeluwe, Jeroen Nienhuis, M. Wieloch, L. Luigujõe, J. Morkūnas, Yu. R. Bogomolova, Ivan Bogdanovich, Scott W. Petrek, K. A. Wood, E. Rees","doi":"10.1080/03078698.2022.2161004","DOIUrl":"https://doi.org/10.1080/03078698.2022.2161004","url":null,"abstract":"ABSTRACT This study aims to determine the level of movement of individuals between the Icelandic and Northwest Mainland European (NWME) Whooper Swan Cygnus cygnus populations, and to assess the extent to which this interchange affects total population estimates. Ringing, resighting and recovery data for Whooper Swans ringed across Europe since the early 1900s were compiled from the EURING Data Bank, national ringing schemes and individual ringers. Birds were assigned to the biogeographical population (Icelandic or NWME) in which they were ringed. Of >18 000 Whooper Swans ringed in 17 European countries, 172 individuals (0.94%) were later found outside the nominal range of their assigned biogeographical population. The proportion of ringed swans from the Icelandic population that were subsequently found ‘out of range’ did not differ significantly from the proportion recorded for the NWME population, indicating no directional bias in population interchange. Population switching by Whooper Swans in western Europe occurs consistently, but currently at very low levels. Our results reinforce the view that such levels of population interchange are unlikely to have caused major inaccuracies or biases in the total numbers recorded during the coordinated censuses used to estimate population size.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"1 - 12"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47225247","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}
Pub Date : 2022-07-03DOI: 10.1080/03078698.2022.2160788
W. Payne, Daniel M Wade, I. Hartley, Jen Shemmings-Payne
ABSTRACT Thermal cameras are being used increasingly in the bird-ringing community and preliminary reports suggest they have a wide range of relevant applications. However, there has been little quantitative assessment of these methods. In this study we tested the use of a thermal imager to assess the occupancy of enclosed nests, using nest-box populations of small passerines. Based on a thermal image of each nest box, observers were able to predict nest-box occupancy with a combined success rate of 85.9%. The observers were able to identify when nest boxes contained a heat source relating to an active nest but unable to differentiate between warm clutches and live broods. The age of the brood significantly influenced the predictions, reflecting the limited ability of young broods to maintain their body temperatures independently. There were no significant effects from potential confounding variables relating to solar exposure, nest-box design or ambient temperature, although these may have accounted for a small number of incorrect predictions. Overall, it was found that thermal imagers provide an effective, non-invasive and efficient method for monitoring nest-box occupancy, with inferences about suitability for other types of enclosed nest.
{"title":"An evaluation of thermal imaging as a tool for assessing occupancy of enclosed nests","authors":"W. Payne, Daniel M Wade, I. Hartley, Jen Shemmings-Payne","doi":"10.1080/03078698.2022.2160788","DOIUrl":"https://doi.org/10.1080/03078698.2022.2160788","url":null,"abstract":"ABSTRACT Thermal cameras are being used increasingly in the bird-ringing community and preliminary reports suggest they have a wide range of relevant applications. However, there has been little quantitative assessment of these methods. In this study we tested the use of a thermal imager to assess the occupancy of enclosed nests, using nest-box populations of small passerines. Based on a thermal image of each nest box, observers were able to predict nest-box occupancy with a combined success rate of 85.9%. The observers were able to identify when nest boxes contained a heat source relating to an active nest but unable to differentiate between warm clutches and live broods. The age of the brood significantly influenced the predictions, reflecting the limited ability of young broods to maintain their body temperatures independently. There were no significant effects from potential confounding variables relating to solar exposure, nest-box design or ambient temperature, although these may have accounted for a small number of incorrect predictions. Overall, it was found that thermal imagers provide an effective, non-invasive and efficient method for monitoring nest-box occupancy, with inferences about suitability for other types of enclosed nest.","PeriodicalId":35936,"journal":{"name":"Ringing and Migration","volume":"37 1","pages":"26 - 36"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41541933","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号