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Biodiversity Observations最新文献

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Observations and analysis of Ayres’s Hawk-Eagle Hieraaetus ayresii occurrence and behaviour over the Linksfield Ridge, Johannesburg, South Africa 南非约翰尼斯堡林克斯菲尔德山脊上空艾尔斯鹰的出现和行为的观察与分析
Biodiversity Observations Pub Date : 2023-02-13 DOI: 10.15641/bo.1246
Paul Da Cruz
{"title":"Observations and analysis of Ayres’s Hawk-Eagle Hieraaetus ayresii occurrence and behaviour over the Linksfield Ridge, Johannesburg, South Africa","authors":"Paul Da Cruz","doi":"10.15641/bo.1246","DOIUrl":"https://doi.org/10.15641/bo.1246","url":null,"abstract":"A series of sightings of the Ayres’s Hawk-Eagle (Hieraaetus ayresii) were made over two summers in 2020-2021 and 2021-2022 from a property in Fellside, north-eastern Johannesburg. Sightings of the species were of individual birds in flight over the Linksfield Ridge and Louis Botha Avenue, both located a short distance to the south of the observation location. It is postulated that the combination of an abundance of prey in the form of Rock Doves (Columba livia) that inhabit the built-up urban environment of Louis Botha Avenue in high densities and the presence of a well vegetated (effectively wooded) ridge in close proximity appear to be the factors that draw the species to this particular location within Johannesburg. Although the sighting records did not form part of a dedicated monitoring protocol, the observations of the species were submitted to the SABAP2 project, and these and other records of the species in Johannesburg and Pretoria have been analysed to gain an understanding of the timing of the species’ occurrence within the urban centres of Gauteng. The wider SABAP2 dataset indicates that the species has been most commonly recorded in mid-summer (the months of December and February), with the next highest monthly recording rates being for spring and early summer. Further monitoring and observations for the presence of this species are recommended in areas of suitable habitat within Johannesburg (ridges in close proximity to concentrations of Rock Dove populations) to determine if it favours such location and occurs more widely and commonly than currently understood.    ","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122397337","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}
引用次数: 0
Sparrows roosting and breeding in old nests of Cape Weavers Ploceus capensis 麻雀栖息和繁殖在海角织鸟的旧巢
Biodiversity Observations Pub Date : 2023-02-13 DOI: 10.15641/bo.1323
H. Oschadleus
{"title":"Sparrows roosting and breeding in old nests of Cape Weavers Ploceus capensis","authors":"H. Oschadleus","doi":"10.15641/bo.1323","DOIUrl":"https://doi.org/10.15641/bo.1323","url":null,"abstract":"The first record of Southern Grey-headed Sparrows Passer diffusus breeding in a nest in an old colony of Cape Weavers Ploceus capensis is described. This is the second record of this species breeding in any weaver nest. A pair of Cape Sparrows Passer melanurus were observed roosting in another nest in the colony. They returned to the same nest during the night after being disturbed.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"1041 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131588247","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}
引用次数: 0
Records of tail bifurcation in rainbow lizards Agama agama (Linnaeus, 1758) in Umudike, Nigeria 尼日利亚乌姆迪克的彩虹蜥蜴Agama Agama (Linnaeus, 1758)尾巴分叉的记录
Biodiversity Observations Pub Date : 2023-02-07 DOI: 10.15641/bo.691
L. N. Onyenweaku, Augustibe U Ezealor, Kingsley U Maxwell
{"title":"Records of tail bifurcation in rainbow lizards Agama agama (Linnaeus, 1758) in Umudike, Nigeria","authors":"L. N. Onyenweaku, Augustibe U Ezealor, Kingsley U Maxwell","doi":"10.15641/bo.691","DOIUrl":"https://doi.org/10.15641/bo.691","url":null,"abstract":"This paper reports sightings of rainbow lizards Agama agama with bifurcated tails in a community in Umudike, Nigeria. Five individuals (two males and three females) were sighted within one month at different occasions within approximately 1 km radius in a semi-urban habitat with high human activity. We consider this to be an unusual aberration among lizard populations in the tropical forest ecosystem in Nigeria. Hence, we believe that there could be a genetic or environmental connotation to the high frequency of occurrence of this aberration within the locality.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117035051","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}
引用次数: 1
Observations of claw differences in an invasive crayfish (Orconectes virilis) 一种入侵小龙虾(Orconectes virilis)爪部差异的观察
Biodiversity Observations Pub Date : 2023-02-06 DOI: 10.15641/bo.1222
Amanda Luzardo, Nicole M Johnson, Julia Custelcean, Sophie Prevost, C. Sampson, S. M. Vamosi, Emily Baumgartner
{"title":"Observations of claw differences in an invasive crayfish (Orconectes virilis)","authors":"Amanda Luzardo, Nicole M Johnson, Julia Custelcean, Sophie Prevost, C. Sampson, S. M. Vamosi, Emily Baumgartner","doi":"10.15641/bo.1222","DOIUrl":"https://doi.org/10.15641/bo.1222","url":null,"abstract":"The Northern Crayfish (Orconectes virilis) is a relatively new invasive species to Calgary, Alberta Canada. We observed unique morphological characteristics concerning the claws (cheliped) of four (3 males and 1 female) out of 31 crayfish captured using a sweep sampling method from a creek in Calgary, Canada. These specimens exhibited a notable difference in claw size between the right and left claws. Differences in claw sizes can be attributed to an ongoing process of regeneration due to loss of the crayfish’s cheliped.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134326578","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}
引用次数: 0
Prey items of Southern Fiscal Lanius collaris in southern Namibia 在纳米比亚南部的南部财政Lanius衣领的猎物项目
Biodiversity Observations Pub Date : 2023-02-03 DOI: 10.15641/bo.1244
Peter L Cunningham (Snr), Peter L Cunningham (Jnr)
{"title":"Prey items of Southern Fiscal Lanius collaris in southern Namibia","authors":"Peter L Cunningham (Snr), Peter L Cunningham (Jnr)","doi":"10.15641/bo.1244","DOIUrl":"https://doi.org/10.15641/bo.1244","url":null,"abstract":"Although Southern Fiscals Lanius collaris are a common species in southern Namibia, we found only 18 impalements of prey items. We discuss these in relation to the species impaled, the site of impalement, the height above ground and the time of the year. We suggest that the small number of observations was due to the fact that the study period (July 2017 to June 2022) had below average rainfall, that food was therefore scarce and consumed, and that impalements events were rare.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115134948","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}
引用次数: 0
Web-sourced photographic methods reveal dietary composition and shifts in resident and migrant Coracias rollers in southern Africa 网络来源的摄影方法揭示了非洲南部居民和移民Coracias辊的饮食组成和变化
Biodiversity Observations Pub Date : 2023-02-01 DOI: 10.15641/bo.1227
L. Nupen, Maya Gardner, Julia Morin, Tshianeo M. Ndou, Emily Kathleen Dugmore
{"title":"Web-sourced photographic methods reveal dietary composition and shifts in resident and migrant Coracias rollers in southern Africa","authors":"L. Nupen, Maya Gardner, Julia Morin, Tshianeo M. Ndou, Emily Kathleen Dugmore","doi":"10.15641/bo.1227","DOIUrl":"https://doi.org/10.15641/bo.1227","url":null,"abstract":"Closely related species coexisting in the same niche often have dietary overlap and interspecific competition can result in resource partitioning e.g., dietary shifts, migration or phenological changes. Traditional methods to study avian diets are typically costly, difficult, and invasive. Using web-sourced photographs is an emerging, non-invasive method to study avian foraging ecology. We used this approach, along with photographic road surveys, to study prey composition of migratory European Rollers Coracias garrulus and resident Lilac-breasted Rollers Coracias caudatus where they co-occur in southern Africa. These insectivorous sister species are frequently photographed with prey in their bills because of their conspicuous perch-and-wait foraging behaviour and bright plumage coloration. We collated over 250 photographs of rollers holding prey and identified prey items representing 15 animal orders. Lilac-breasted Roller diet contained six unique orders of prey during the Austral summer (when the European Roller is present), and only one during winter (when the European Roller has migrated north). This suggests that Lilac-breasted Rollers may broaden their diet seasonally to alleviate competition with European Rollers during summer. Additionally, Lilac-breasted and European Rollers had an 84% overlap in dietary composition, potentially representing high interspecific competition - even during wet savanna summers when resource abundance is high - that might have originally driven the evolution of migratory behaviour in the European Roller. Our findings expand the current knowledge of roller diets and highlighting the growing role of social media in ecological studies.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131284445","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}
引用次数: 0
Red-billed Oxpecker Buphagus erythrorhynchus in the KhoiSan Karoo Conservancy, Northern Cape, South Africa 南非北开普省KhoiSan Karoo保护区的红嘴牛嘴鸟Buphagus erythrorhynchus
Biodiversity Observations Pub Date : 2023-02-01 DOI: 10.15641/bo.1318
Josu Meléndez-Arteaga, Jon Blanco, PC Ferreira, R. Nuttall, H. Oschadleus, L. Underhill
{"title":"Red-billed Oxpecker Buphagus erythrorhynchus in the KhoiSan Karoo Conservancy, Northern Cape, South Africa","authors":"Josu Meléndez-Arteaga, Jon Blanco, PC Ferreira, R. Nuttall, H. Oschadleus, L. Underhill","doi":"10.15641/bo.1318","DOIUrl":"https://doi.org/10.15641/bo.1318","url":null,"abstract":"We report the occurrence of a Red-billed Oxpecker Buphagus erythrorhynchus at the New Holme Nature Lodge, Hanover, Northern Cape, South Africa. Sightings were made over the period 4 May to 3 September 2022.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131640287","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}
引用次数: 1
Arthropod associates of a Yellow-billed Cuckoo Coccyzus americanus on Vaca Key, Monroe County, Florida, USA 美国佛罗里达州门罗县Vaca Key上的美洲黄嘴杜鹃节肢动物
Biodiversity Observations Pub Date : 2023-02-01 DOI: 10.15641/bo.1154
L. Hribar
{"title":"Arthropod associates of a Yellow-billed Cuckoo Coccyzus americanus on Vaca Key, Monroe County, Florida, USA","authors":"L. Hribar","doi":"10.15641/bo.1154","DOIUrl":"https://doi.org/10.15641/bo.1154","url":null,"abstract":"Examination of a carcass of a Yellow-billed Cuckoo Coccyzus americanus (L.) (Cuculiformes: Cuculidae) provided the first record of a louse in the genus Cuculoecus (Psocodea: Philopteridae), a springtail Seira brasiliana (Arlé) (Collembola: Entomobryidae), and a tetranychid mite in the genus Oligonychus (Trombidiformes: Tetranychidae), from Vaca Key, Monroe County, Florida, USA.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"335 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115982300","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}
引用次数: 0
Attempted forced copulation by an immature Red-winged Blackbird male: Video evidence from the Grand River Grasslands of Iowa and potential explanations 一只未成熟的红翼黑鸟试图强迫交配:来自爱荷华州大河草原的视频证据和可能的解释
Biodiversity Observations Pub Date : 2023-01-26 DOI: 10.15641/bo.1267
Wendy P. Tori, Joshua Angell, Hannah Grushon, Claudette Roskamp, Thea E. Clarkberg, E. King, Molly McKellar, Jessica Mingione, Jaime Coon
{"title":"Attempted forced copulation by an immature Red-winged Blackbird male: Video evidence from the Grand River Grasslands of Iowa and potential explanations","authors":"Wendy P. Tori, Joshua Angell, Hannah Grushon, Claudette Roskamp, Thea E. Clarkberg, E. King, Molly McKellar, Jessica Mingione, Jaime Coon","doi":"10.15641/bo.1267","DOIUrl":"https://doi.org/10.15641/bo.1267","url":null,"abstract":"Forced copulations are a type of sexual coercion that typically occurs when the fitness interests of males and females are in conflict. Forced copulations are rare in most species of birds, and there are only a few reports in passerine species. Here we report the first published observation of an immature Red-winged Blackbird Agelaius phoeniceus male attempting a forced copulation on a nesting Red-winged Blackbird female. We describe the behaviour and discuss potential explanations and implications for our observations.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116265007","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}
引用次数: 0
A Guide to the Common Garden Birds of Cape Town, South Africa 南非开普敦常见花园鸟类指南
Biodiversity Observations Pub Date : 2023-01-25 DOI: 10.15641/bo.1316
Karis A. Daniel, Megan Loftie-Eaton
{"title":"A Guide to the Common Garden Birds of Cape Town, South Africa","authors":"Karis A. Daniel, Megan Loftie-Eaton","doi":"10.15641/bo.1316","DOIUrl":"https://doi.org/10.15641/bo.1316","url":null,"abstract":"This annotated picture booklet aims to provide a quick identification guide to the common birds in Cape Town’s urban gardens. This guide covers the 32 species you are most likely to encounter; though it is not comprehensive, the species included have been carefully selected to help you make a start.","PeriodicalId":155392,"journal":{"name":"Biodiversity Observations","volume":"382 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134160195","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}
引用次数: 1
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