File:Enallagma cyathigerum 13(loz).jpg
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Deutsch: Eine männliche Gemeine Becherjungfer (Enallagma cyathigerum), nähe Schleswig, nördliches Schleswig-Holstein. Dieses Exemplar zeigt eine deutlich ausgeprägte Kältefärbung, zu der Enallagma cyathigerum durch einen physiologischen Farbwechsel befähigt ist, bei dem durch Pigmentwanderung in den Epidermiszellen die Körperfarbe bräunlich verdunkelt wird. Da dieser Effekt nur bei tiefen Außentemperaturen auftritt, dient er wahrscheinlich dem schnelleren Aufwärmen durch die höhere Absorption der Sonnenstrahlung in der dunklen Farbphase. Das Foto entstand am 20. Mai 2011 um 7.31 Uhr morgens, nach Auskunft eines Online-Wetterdienstes betrug die Nachttemperatur in der nahegelegenen Stadt Schleswig an diesem Tage 4,5 °C, die genaue Temperatur des Mikroklimas am Fotostandort kann etwas abweichen. Dass es sich nicht etwa um eine Jugendfärbung handelt, zeigen die vollständig ausgefärbten blauen Augen und die verbleibenden Farbreste in den Einschnürungen von Thorax und Abdomen.
English: A male Common Blue Damselfly (Enallagma cyathigerum), near Schleswig, northern Schleswig-Holstein. This specimen shows a very pronounced cold colour, since this effect occurs only at low temperatures, it is likely to warm up faster by the higher absorption of solar radiation in the dark colour phase. The photo was taken on 20 May 2011 at 7.31 clock in the morning, according to information from an online weather service, the night temperature in the nearby town of Schleswig was 4,5 °C, the exact temperature of the microclimate at the photo location could vary slightly. The fully coloured blue eyes and the remaining colour of chest and abdomen shows that this is no immature specimen. |
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| Source | Own work |
| Author | Loz (L. B. Tettenborn) |
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When using this image outside the Wikipedia project, you have to attribute the author's name (L. B. Tettenborn) in a readable manner and in direct proximity to the image under the terms of the Creative Commons License (see below). Please report references to Loz. I, the copyright holder of this work, hereby publish it under the following license:    This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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| Camera Model | Canon EOS 400D |
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| Shutter speed | 1/500 s |
| Aperture | f/8,0 |
| Film speed (ISO) | 400 |
| Lens | Canon EF 100mm 1:2.8 Macro USM |
| Focal length | 100 mm [35mm Equiv: 160 mm] |
| Support | Manfrotto MA 685B Neotec |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:55, 18 July 2011 | | 3,888 × 2,592 (6.32 MB) | Loz (talk | contribs) | |
| 11:01, 12 July 2011 |  | 3,888 × 2,592 (6.18 MB) | Loz (talk | contribs) | {{Information |Description= {{de|Eine männliche Gemeine Becherjungfer (''Enallagma cyathigerum''), nähe Schleswig, nördliches Schleswig-Holstein. Dieses Exemplar zeigt eine deutlich ausgeprägte Kältefärbung, zu der |
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