Ostrich最新文献

{"title":"101 Curious Tales of East African Birds: A Brief Introduction to Tropical Ornithology101 Curious Tales of East African Birds: A Brief Introduction to Tropical Ornithology, Author: C Beale, 2023, London: Pelagic Publishing, Paperback GBP 25.00, ebook GBP 20.00, ISBN 9781784272913, 222 pp, https://pelagicpublishing.com/products/101-curious-tales-of-east-african-birds","authors":"H Dieter Oschadleus","doi":"10.2989/00306525.2023.2274725","DOIUrl":"https://doi.org/10.2989/00306525.2023.2274725","url":null,"abstract":"","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136318626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Avian species assemblages in African mangrove forests","authors":"W Richard J Dean, Suzanne Milton","doi":"10.2989/00306525.2023.2263171","DOIUrl":"https://doi.org/10.2989/00306525.2023.2263171","url":null,"abstract":"AbstractAfrican mangrove forests are threatened by harvesting and climate change. Most bird species that occur in this habitat are either drawn from adjacent forests or woodlands or are marine and piscivorous species. Bird communities of East and southern African mangroves, along the coast from the northern shores of the Red Sea to the Mngazana Estuary in South Africa, are known mainly from a few vegetation studies. Mangrove bird communities in West and Central Africa are better studied, and are listed in this review, together with notes on habitat use within the mangroves. No African bird species are restricted to mangroves, but four species are strongly associated with mangroves in West and Central Africa. These mangrove forests also provide space for migrant warblers (of families Acrocephalidae, Phylloscopidae and Sylviidae), possibly because they lack similar-sized species that are resident in other African forest types. Although African mangroves appear to lack a distinctive avifauna, their possible values as foraging sites for resident coastal and forest birds and as refugia for migrating warblers remain to be documented.Assemblages d’espèces d’oiseaux dans les forêts de mangrove africainesLes forêts de mangroves africaines sont menacées par l’exploitation et le changement climatique. La plupart des espèces d’oiseaux présentes dans cet habitat proviennent des forêts ou des zones boisées adjacentes ou sont des espèces marines et piscivores. Les communautés d’oiseaux des mangroves d’Afrique de l’Est et d’Afrique australe, le long de la côte, depuis les rives septentrionales de la mer Rouge jusqu’à l’estuaire de Mngazana en Afrique du Sud, sont connues principalement grâce à quelques études sur la végétation. Les communautés d’oiseaux des mangroves d’Afrique de l’Ouest et d’Afrique centrale sont mieux étudiées et sont répertoriées dans cette étude, avec des notes sur l’utilisation de l’habitat dans les mangroves. Aucune espèce d’oiseau africain ne se limite aux mangroves, mais quatre espèces sont fortement associées aux mangroves d’Afrique de l’Ouest et d’Afrique centrale. Ces forêts de mangroves offrent également de l’espace aux fauvettes migratrices (Acrocephalidae, Phylloscopidae, Sylviidae), peut-être parce qu’elles manquent d’espèces de taille similaire qui sont présentes dans d’autres types de forêts africaines. Bien que les mangroves africaines semblent dépourvues d’une avifaune distincte, leur valeur éventuelle en tant que sites d’alimentation pour les oiseaux côtiers et forestiers résidents et en tant que refuges pour les fauvettes migratrices reste à documenter.Keywords: AcrocephalidaeAvicenniaLaguncularia racemosamigrant warblersPhylloscopidaeRhizophoraSylviidae","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135616931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Primary moult in the annual cycle of adult African Oystercatchers <i>Haematopus moquini</i>","authors":"Taylyn C Bate, Peter G Ryan, Les G Underhill","doi":"10.2989/00306525.2023.2250560","DOIUrl":"https://doi.org/10.2989/00306525.2023.2250560","url":null,"abstract":"AbstractAfrican Oystercatchers Haematopus moquini are sedentary, intertidal foraging birds, range-restricted to Namibia and South Africa. Their annual cycle has two components: breeding and moult. The Underhill–Zucchini model estimated a primary moult duration of 154 days, and mean start and completion dates of 1 April and 2 September. Most eggs (90%) are laid between mid-November and mid-February; thus, on average, oystercatchers have 2–3 months between moult completion and egg laying. The completion date confirms an overlap between moult and the period of post-fledging dependence of juveniles on their parents. The 154-day primary moult duration spreads the energetic demands of feather production to cope with this overlap and with the fact that primary moult extends through winter when storms make intertidal areas inaccessible for days. There are approximately 50 quantitative studies of primary moult for migrant waders (suborder Charadrii); this is the third for a resident species. The other two species of migrant waders studied are in south-eastern Australia: the Hooded Dotterel Thinornis cucullatus and Sooty Oystercatcher Haematopus fuliginosus. The Hooded Dotterel has one of the longest estimated moult durations (203 days) and its moult and breeding overlap. The annual schedules for the Sooty Oystercatcher and African Oystercatcher are similar, as is the estimated moult duration: 149 and 154 days, respectively. Preliminary studies of the primary moult of the Eurasian Oystercatcher H. ostralegus indicate the duration to be 100 days, which is two-thirds that of the two sedentary oystercatchers. This is likely a consequence of Eurasian Oystercatchers having migration and harsh winter conditions as additional components of their annual cycle, and thus a limited period for primary moult. This study was based largely on photographic records of African Oystercatchers in flight, with contributions by citizen scientists. We make two key conclusions: the need for more studies of the moult strategies of the Haematopidae and resident waders; and digital photography of free-ranging birds can be used to study primary moult.La mue primaire dans le cycle annuel de l’Huîtrier de Moquin Haematopus moquiniL’Huîtrier de Moquin Haematopus moquini est une espèce sédentaire qui s’alimente dans les zones intertidales et dont l’aire de répartition est limitée à la Namibie et à l’Afrique du Sud. Le calendrier annuel comporte deux composantes : la reproduction et la mue. Le modèle de mue Underhill–Zucchini a estimé la durée de la mue primaire à 154 jours, et les dates moyennes de début et de fin de la mue au 1er avril et au 2 septembre. La plupart des oeufs (90%) sont pondus entre mi-novembre et mi-février; ainsi, en moyenne, les huîtriers ont deux à trois mois entre la fin de la mue et la ponte. La date d’achèvement de la mue confirme un chevauchement entre la mue et la période de dépendance des juvéniles vis-à-vis de leurs parents après l’envol. La durée de 154 jours","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135570210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pattern and intensity of moult in White-capped/Shy Albatrosses <i>Thalassarche steadi/cauta</i>","authors":"Peter G Ryan, Oluwadunsin E Adekola","doi":"10.2989/00306525.2023.2263169","DOIUrl":"https://doi.org/10.2989/00306525.2023.2263169","url":null,"abstract":"AbstractAlbatrosses typically only replace a subset of flight feathers each annual moult cycle. We scored the moult of 662 White-capped/Shy Albatrosses Thalassarche steadi/cauta, using birds that had been killed by longline fisheries off South Africa. Most adults and immatures alternated replacing the outer primaries (phase 1) and inner primaries (phase 2), but there was considerable variation among adults, with 0–10 primaries replaced each moult cycle. Birds in phase 1 moult replaced fewer primaries than birds in phase 2, but the proportion by mass was similar. Adults replaced more primaries than immatures as there was a disproportionate number of adults in phase 2 moult (82%), which might indicate that most adults off South Africa are in their first year after a successful breeding attempt, but a similar bias occurred among beached birds from New Zealand and Australia. The outer primaries were usually replaced outwards from P8, but the replacement sequence was more variable among the inner primaries. Secondary moult overlapped with primary moult, but not all secondaries were moulted each year. Adults had more active moult centres and replaced more secondaries at once than immatures. Tail moult started after primary moult, with 1–11 feathers growing from 1–6 active centres. Some birds replaced their rectrices in pairs, with often 2 or 3 pairs moulting at once, but others replaced alternate feathers or almost all rectrices at once. A few birds exhibited intense wing moult, but the norm was to replace only 1 or 2 primaries and 1–6 secondaries at once. Age- and sex-related differences in moult intensity presumably result from different time constraints. Adult White-capped/Shy Albatrosses take a year off between successful breeding attempts, allowing time for a more protracted moult. However, we cannot explain the intense moult in some immatures. Our findings support recent studies showing that albatross flight feather moult patterns are more varied than previously reported.Schéma et intensité de la mue chez l’Albatros à cape blanche Thalassarche steadi/cautaLes albatros ne remplacent généralement qu’un sous-ensemble de plumes de vol à chaque cycle de mue annuel. Nous avons évalué la mue de 662 Albatros à cape blanche Thalassarche steadi/cauta tués par la pêche à la palangre au large de l’Afrique du Sud. La plupart des adultes et des immatures remplaçaient alternativement les primaires externes (phase 1) et internes (phase 2), mais il y avait une variation considérable parmi les adultes, avec 0–10 primaires remplacées à chaque cycle de mue. Les oiseaux en phase 1 de la mue remplacent moins de primaires que les oiseaux en phase 2, mais la proportion en masse est similaire. Les adultes ont remplacé plus de primaires que les immatures en raison d’un nombre disproportionné d’adultes en phase 2 de la mue (82%), ce qui pourrait indiquer que la plupart des adultes au large de l’Afrique du Sud sont dans leur première année après une tentative de reproductio","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135778358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Twenty-three new bird species for Angola, including Mayombe National Park in Cabinda Province, and other noteworthy records","authors":"Michael SL Mills, Rogério Ferreira, Pedro Vaz Pinto","doi":"10.2989/00306525.2023.2237686","DOIUrl":"https://doi.org/10.2989/00306525.2023.2237686","url":null,"abstract":"AbstractThe avifauna of Cabinda Province, Angola, is poorly known; since 1885 only one ornithological expedition has been made to the province, by AA da Rosa Pinto in 1969. All previous works that include Cabinda, including those of Rosa Pinto, were confined to the coastal and central zones (Lower Mayombe), with the higher-altitude eastern zone (Upper Mayombe) completely unexplored. With access to Cabinda recently improved, we made four short field trips (in 18–21 March 2022, 15–17 June 2022, 23–27 September 2022, and 3–10 June 2023), focused mainly on the Upper Mayombe area, as part of an ongoing effort to make biological inventories for poorly known regions of Angola, which include Mayombe National Park. We recorded 256 bird species: 101, 139, 157 and 187 during Visits 1–4, respectively. Among these were 23 new species records for Angola, most of which were either sound recorded or photographed as evidence. A further 11 species were new to Cabinda but had previously been recorded elsewhere in Angola, and an additional 34 species had previously been recorded fewer than ten times from Angola. These records highlight the biological importance of Mayombe National Park and its significant contribution to the overall biodiversity of Angola.Vingt-trois nouvelles espèces d’oiseaux pour l’Angola, du parc national de Mayombe, Cabinda, et autres registres remarquablesL’avifaune de Cabinda est mal connue ; depuis 1885, une seule expédition ornithologique a été effectuée dans cette province d’Angola, par AA da Rosa Pinto en 1969. Tous les travaux antérieurs sur Cabinda, y compris ceux Rosa Pinto, se sont limités à la zone côtière et à la zone centrale (Bas Mayombe), la zone orientale de plus haute altitude (Haut Mayombe) n’ayant pas été explorée. L’accès à Cabinda ayant été récemment amélioré, nous avons effectué quatre courtes visites de terrain (18–21 mars 2022, 15–17 juin 2022, 23–27 septembre 2022 et 3–10 juin 2023) focalisées principalement sur la zone du Haut Mayombe, dans le cadre d’un effort continu pour réaliser des inventaires biologiques dans des régions mal connues de l’Angola, qui comprennent le Parc national du Mayombe. Nous avons inventarié 256 espèces d’oiseaux: 101, 139, 157 et 187 lors de chaque visite, respectivement. Parmi ces espèces, 23 étaient nouvelles pour l’Angola, la plupart d’entre elles ayant été enregistrées ou photographiées comme preuve. Onze autres espèces étaient nouvelles pour Cabinda mais avec des registres ailleurs en Angola, et 34 autres espèces avaient été répertoriés moins de dix fois en Angola. Ces registres soulignent l’importance biologique du parc national de Mayombe et sa contribution significative à la biodiversité globale de l’Angola.Vinte e três novas aves para Angola no Parque Nacional do Mayombe, Província de Cabinda, e outros registos notáveisA avifauna de Província de Cabinda é pouco conhecida; desde 1885 apenas uma expedição ornitológica—por AA da Rosa Pinto em 1969—tinha sido feita a esta província angol","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135884452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Primary moult of adult Laughing Doves <i>Spilopelia senegalensis:</i> introduction of the relative duration index and a comparison of moult indices","authors":"Tanya Scott, Les G Underhill, George D Underhill","doi":"10.2989/00306525.2023.2265571","DOIUrl":"https://doi.org/10.2989/00306525.2023.2265571","url":null,"abstract":"AbstractA new moult index, the relative duration index (RDI), was developed to quantify progress through moult using the Underhill–Zucchini model of primary avian moult, with the Laughing Dove Spilopelia senegalensis as a case study. The RDI weights individual primaries in accordance with their estimated relative moult durations in the same way that proportion feather mass grown (PFMG) weights primaries in accordance with their relative masses. A sample of 1 893 moult records of adult Laughing Doves was used to study their primary moult. Moult parameters were estimated for three moult indices: the traditional moult score (TMS), PFMG and the RDI, and for each of the 10 primaries. Comparing the moult parameter estimates of each of the three indices to their respective cumulative growth curves obtained from the progression of moult of individual primaries, PFMG had the closest fit. However, any of the three moult indices would give satisfactory results for the Laughing Dove. Laughing Doves had an estimated primary moult duration of 215 days, with mean start and end dates of 3 November and 6 June, respectively. The standard deviation parameter was 66 days, which implies a lack of synchronisation of moult in adult doves. It was hypothesised that the RDI might be an appropriate moult index for species that moult one feather at a time and for which the individual moult durations are not proportional to their mass, as seen in Laughing Doves. However, this was not the case as PFMG provided the best fit. The RDI might also prove to be an appropriate moult index for species that moult multiple feathers simultaneously during part of the moult period and these feathers grow more slowly than when fewer feathers are moulting simultaneously.Mue primaire des Tourterelles maillées Spilopelia senegalensis adultes: introduction de l’indice de durée relative et comparaison des indices de mueUn nouvel indice de mue, le ‘relative duration index’ (RDI: indice de durée relative), permettant de quantifier la progression de la mue à l’aide du modèle de mue Underhill–Zucchini a été développé en utilisant la tourterelle maillée Spilopelia senegalensis comme modèle. RDI pondère les primaires individuelles en fonction de leur durée de mue relative estimée, de la même manière que l’indice ‘proportion feather mass grown’ (PFMG: proportion de masse de la plume en croissance) pondère les primaires en fonction de leur masse relative. Un échantillon de 1 893 enregistrements de mue de tourterelles maillées adultes a été utilisé pour étudier leur mue primaire. Les paramètres de la mue ont été estimés avec trois indices de mue: ‘traditional moult score’ (TMS: classification traditionnelle de la mue), PFMG et RDI, pour chacune des 10 plumes primaires. En comparant les estimations des paramètres de mue de chacun des trois indices à leurs courbes de croissance cumulées respectives, obtenues à partir de la progression de la mue des primaires individuelles, le PFMG a retourné l’ajustement l","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"1131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Primary moult of adult Laughing Doves <i>Spilopelia senegalensis</i> : introduction of the relative duration index and a comparison of moult indices","authors":"Tanya Scott, Les G Underhill, George D Underhill","doi":"10.2989/00306525.2023.2255749","DOIUrl":"https://doi.org/10.2989/00306525.2023.2255749","url":null,"abstract":"AbstractA new moult index, the relative duration index (RDI), was developed to quantify progress through moult using the Underhill–Zucchini model of primary avian moult, with the Laughing Dove Spilopelia senegalensis as a case study. The RDI weights individual primaries in accordance with their estimated relative moult durations in the same way that proportion feather mass grown (PFMG) weights primaries in accordance with their relative masses. A sample of 1 893 moult records of adult Laughing Doves was used to study their primary moult. Moult parameters were estimated for three moult indices: the traditional moult score (TMS), PFMG and the RDI, and for each of the 10 primaries. Comparing the moult parameter estimates of each of the three indices to their respective cumulative growth curves obtained from the progression of moult of individual primaries, PFMG had the closest fit. However, any of the three moult indices would give satisfactory results for the Laughing Dove. Laughing Doves had an estimated primary moult duration of 215 days, with mean start and end dates of 3 November and 6 June, respectively. The standard deviation parameter was 66 days, which implies a lack of synchronisation of moult in adult doves. It was hypothesised that the RDI might be an appropriate moult index for species that moult one feather at a time and for which the individual moult durations are not proportional to their mass, as seen in Laughing Doves. However, this was not the case as PFMG provided the best fit. The RDI might also prove to be an appropriate moult index for species that moult multiple feathers simultaneously during part of the moult period and these feathers grow more slowly than when fewer feathers are moulting simultaneously.Mue primaire des Tourterelles maillées Spilopelia senegalensis adultes: introduction de l’indice de durée relative et comparaison des indices de mueUn nouvel indice de mue, le ‘relative duration index’ (RDI: indice de durée relative), permettant de quantifier la progression de la mue à l’aide du modèle de mue Underhill–Zucchini a été développé en utilisant la tourterelle maillée Spilopelia senegalensis comme modèle. RDI pondère les primaires individuelles en fonction de leur durée de mue relative estimée, de la même manière que l’indice ‘proportion feather mass grown’ (PFMG: proportion de masse de la plume en croissance) pondère les primaires en fonction de leur masse relative. Un échantillon de 1 893 enregistrements de mue de tourterelles maillées adultes a été utilisé pour étudier leur mue primaire. Les paramètres de la mue ont été estimés avec trois indices de mue: ‘traditional moult score’ (TMS: classification traditionnelle de la mue), PFMG et RDI, pour chacune des 10 plumes primaires. En comparant les estimations des paramètres de mue de chacun des trois indices à leurs courbes de croissance cumulées respectives, obtenues à partir de la progression de la mue des primaires individuelles, le PFMG a retourné l’ajustement l","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136077869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Community involvement in the mass capture of Red-billed Queleas <i>Quelea quelea</i> adjacent to protected areas: the case of Chemba District, Dodoma, Tanzania","authors":"Naza Emanuel Mmbaga, Richard John Mongi, Mhuji Bukheti Kilonzo, Leonard Kamanga Katalambula","doi":"10.2989/00306525.2023.2250077","DOIUrl":"https://doi.org/10.2989/00306525.2023.2250077","url":null,"abstract":"AbstractThe mass capture and utilisation of Red-billed Queleas Quelea quelea as a source of food is practiced in different African countries. The current study sought information on the trapping methods and techniques used by local communities in Chemba District, Tanzania, taking into account the respondents’ age, gender and occupation. It also captured the economic contributions and challenges associated with trapping queleas across the three study villages. Semi-structured questionnaires, focus group discussions and direct observations were used. Male respondents and adult farmers were found to participate most in quelea trapping. Queleas were used both as a source of food and income. Both a modern method (i.e. mist-netting) and traditional local trapping methods (e.g. grass basket traps and sticky tree resin) were reported to be used, but the combination of the modern and local methods was the most effective. Reported challenges included poor trapping techniques, scarcity of markets, and chemical spraying as a quelea control measure. Based on the results, we recommend detailed research on improving mass-trapping techniques and developing a marketing strategy to promote sales of the captured birds. As a long-term measure, these will contribute to improve both the livelihoods of local people and the ecological health of the communities.Implication des communautés dans la capture massive du travailleur à bec rouge Quelea quelea à proximité de zones protégées: le cas du district de Chemba, Dodoma, TanzanieLa capture massive et l’utilisation du Travailleur à bec rouge Quelea quelea comme source de nourriture sont pratiquées dans différents pays africains. La présente étude a cherché à obtenir des informations sur les méthodes et techniques de capture utilisées par les communautés locales du district de Chemba, en Tanzanie, en tenant compte de l’âge, du gendre et de la profession des personnes interrogées. Elle s’est également intéressée aux contributions économiques et aux défis associés au piégeage des Quelea quelea dans les villages étudiés. Des questionnaires semi-structurés, des discussions de groupe ciblées et des observations directes ont été utilisés. Les personnes interrogées de genre masculin et les agriculteurs adultes excellent dans le piégeage de l’éspèce. Les Travailleurs à bec rouge sont utilisés comme source de nourriture et de revenus. Différentes méthodes de piégeage ont été utilisées, mais c’est la combinaison de plusieurs méthodes qui est la plus efficace. Parmi les difficultés signalées, citons des mauvaises techniques de piégeage, la rareté des marchés où écouler les oiseaux capturés et la pulvérisation de produits chimiques comme mesure de contrôle de l’espèce. L’étude recommande une recherche détaillée sur l’amélioration des techniques de piégeage et le développement de stratégies de marketing pour promouvoir la vente commerciale de ces oiseaux. Ces mesures à long terme contribueront à améliorer les moyens de subsistance des ","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135895243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plumage dimorphism and moult patterns of weaverbirds – a review","authors":"H. Oschadleus, S. Andersson","doi":"10.2989/00306525.2023.2234646","DOIUrl":"https://doi.org/10.2989/00306525.2023.2234646","url":null,"abstract":"","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47615186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Pleistocene avian ichnosites on South Africa’s Cape south coast","authors":"Charles W Helm, Martin G Lockley, Andrew S Carr, Hayley C Cawthra, Jan C De Vynck, Mark G Dixon, Pieter-Jan Gräbe, Renée Rust","doi":"10.2989/00306525.2023.2255385","DOIUrl":"https://doi.org/10.2989/00306525.2023.2255385","url":null,"abstract":"AbstractTwelve new avian ichnosites have been identified on South Africa’s Cape south coast, adding to the 29 sites previously identified. More than half of these 41 avian ichnosites are found along a 9-km stretch of coastline east of Still Bay. The new sites provide the first southern African trace fossil records of the dove, stork and heron families, as well as a possible ostrich trackway and evidence of probable ostrich eggshell fragments. They buttress the previous inference of large avian chronospecies during the Pleistocene. The preponderance of large- and mediumsized tracks can be attributed to a bias whereby fossil tracks of larger, heavier birds are easier to recognise and interpret. Four of the longest fossil avian trackways ever to be identified occur within a 350-m stretch of coastline in the Driefontein area, east of Still Bay. The new findings provide an enhanced picture of the Pleistocene avifauna of the region. Many of the new sites are fragile and have limited prospects to endure, emphasising the need to document them through photogrammetry, and to regularly explore the coastline in high-yield areas in search of further sites.Nouveaux ichnosites d’oiseaux du Pléistocène sur la côte sud du Cap en Afrique du SudDouze nouveaux ichnosites d’oiseaux ont été identifiés sur la côte sud du Cap en Afrique du Sud, s’ajoutant aux 29 sites déjà identifiés. Plus de la moitié de ces 41 ichnosites se trouvent le long d’une bande côtière de 9 kilomètres à l’est de Still Bay. Les nouveaux sites fournissent les premières traces fossiles pour l’Afrique australe des familles de pigeons, cigognes et hérons, ainsi qu’une possible empreinte d’autruche et des indices probables de fragments de coquilles d’oeufs d’autruche. Ces évidences supportent l’hypothèse précédente de la présence de chrono-espèces d’oiseaux de grande taille au cours du Pléistocène. La prépondérance des traces de grande et moyenne taille peut être attribuée à un biais selon lequel les empreintes fossiles d’oiseaux plus grands et plus lourds sont plus faciles à reconnaître et à interpréter. Quatre des plus longues pistes d’oiseaux fossiles jamais identifiées se trouvent sur une bande côtière de 350-m dans la région de Driefontein, à l’est de Still Bay. Les nouvelles découvertes offrent une image plus complète de l’avifaune du Pléistocène de la région. Beaucoup des sites sont fragiles et ont des perspectives de survie limitées, ce qui souligne la nécessité de les documenter par photogrammétrie et de chercher régulièrement d’autres sites dans les zones à haut rendement du littoral.Keywords: aeolianitesavian trackschronospeciesichnologyostrich eggshellsphotogrammetry","PeriodicalId":54655,"journal":{"name":"Ostrich","volume":"269 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135718523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}