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Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Fifty-eight taxa of Odonata are herewith reported from Batanta Island (including Arefi and Birie Islands). One new species is described: Argiolestes varga sp. nov. The following ten species are new to the Raja Ampat Islands: Papuagrion magnanimum (Selys, 1876), Gynacantha rosenbergi Kaup, 1867, Palaeosynthemis cf. cervula (Lieftinck, 1938), Diplacina smaragdina Selys, 1878, Nannophlebia amphicyllis Lieftinck, 1933, Pantala flavescens (Fabricius, 1798), Rhodothemis nigripes Lohmann, 1984, Rhyothemis regia (Brauer, 1867), Tramea transmarina propinqua Lieftinck, 1942, Zyxomma multinervorum Carpenter, 1897, and fifteen are new to Batanta: Selysioneura cornelia Lieftinck, 1953, P. magnanimum, Agyrtacantha dirupta (Karsch, 1889), Anax maclachlani Förster, 1898, G. rosenbergi, P. cf. cervula, D. smaragdina, N. amphicyllis, Nesoxenia mysis (Selys, 1878), P. flavescens, R. nigripes, R. regia, Tetrathemis irregularis Brauer, 1868, T. transmarina propinqua, Z. multinervorum. Metagrion postnodale (Selys, 1878) and Selysioneura cf. cervicornu Förster, 1900 are deleted from the faunal lists of Odonata of Raja Ampat and Batanta Islands. The total number of species recorded for Batanta Island is 62.

The European Odonata of the collection in the Zoological Museum of the University Greifswald were registered and determined. Altogether 389 European specimens were evaluated. The largest part is from the 19th century and attributed to the former director C.E.A. Gerstaecker. Localities in Germany are in Mecklenburg-Western Pomerania, Bran- denburg, Bavaria and Thuringia. Further specimens were collected in Poland, Italy, Austria, and Switzerland. Current specimens were collected during a study in 1996 and 1997 in Greifswald. Concerning Mecklenburg-Western Pomerania, Bavaria, Berlin, Brandenburg, and Thuringia some blank Plane survey sheets of distribution were completed. Of seven species the earliest known collected specimens from Brandenburg are held in the collec- tion. The historical collection of Emil von Bernuth is mentioned but the specimens lack locality data, thus they are not evaluable. [ABSTRACT FROM AUTHOR]

The study site was a reed belt of a small shallow lake in the north of Brandenburg (Germany) consisting of Phragmites australis and Typha angustifolia with a very high emerging abundance of Aeshna mixta in the year 2021 where exuviae of this species were counted recurrently from the main emergence period onwards to the disappearance of all specimens. The number of traceable exuviae was decreasing exponentially. After two weeks less than one third of the exuviae could be observed again, 19% were still detected after 30 days, the last one was found after 136 days. The average duration was 16,3 days. [ABSTRACT FROM AUTHOR]

Recent studies suggest insect declines in parts of Europe; however, the generality of these trends across different taxa and regions remains unclear. Standardized data are not available to assess large-scale, long-term changes for most insect groups but opportunistic citizen science data is widespread for some. Here, we took advantage of ‘citizen science’ data to investigate distributional changes of Odonata. We compiled over 1 million occurrence records from different regional databases. We used occupancy detection models to account for imperfect detection and estimate annual distributions for each species during 1980–2016 within 5 x 5 km quadrants. We also compiled data on species attributes that were hypothesized to affect species’ sensitivity to different drivers and related them to the changes in species’ distributions. We further developed a novel approach to cluster groups of species with similar patterns of distributional change to represent multi-species indicators. More species increased (45%) than decreased (29%) or remained stable (26%) in their distribution (i.e., number of occupied quadrants). Species showing increases were generally warm-adapted species and/or running water species, while species showing decreases were cold-adapted species using standing water habitats such as bogs. Time-series clustering defined five main patterns of change – each associated with a specific combination of species attributes, and confirming the key roles of species’ temperature and habitat preferences. Trends in Odonata provide mixed news – improved water quality, coupled with positive impacts of climate change, could explain the positive trends of many species. At the same time, declining species point to conservation challenges associated with habitat loss and degradation. Our study demonstrates the great value of ‘citizen science’ and the work of natural history societies for assessing large-scale distributional change. [ABSTRACT FROM AUTHOR]

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Libellula is the property of Gesellschaft Deutschsprachiger Odonatologen e.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Comparative functional morphology of vein joints in Odonata.