File:Azure damselflies in tandem on Otmoor - geograph.org.uk - 181571.jpg
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editDescriptionAzure damselflies in tandem on Otmoor - geograph.org.uk - 181571.jpg |
English: Azure damselflies in tandem on Otmoor. "They are Azure Damselflies (Coenagrion puella), which are very similar to Common Blue and also very common. The main difference is the shape of the marking at the top of the abdomen (just under the wing bases). In Azure this is 'rugby post' shaped whereas Common Blue has a club-shaped mark (most blue damselfly species differ mostly by their markings in this area). Another difference, also shown in the photo, is the black marks on the side of the thorax (going down from the wing bases) which are absent on Common Blue." This quote is from Hugh Venables, who identified these dragonflies. My photo 182148 shows the dogrose bush they were on, and 181456 shows the drainage ditch near them on the RSPB Otmoor reserve.
See Open University nature trail web pages http://www.open.ac.uk/Nature_Trail/DFsex.htm for an explanation of how this mating of dragonflies works. |
Date | |
Source | From geograph.org.uk |
Author | David Hawgood |
Attribution (required by the license) InfoField | David Hawgood / Azure damselflies in tandem on Otmoor / |
InfoField | David Hawgood / Azure damselflies in tandem on Otmoor |
Object location | 51° 48′ 45″ N, 1° 11′ 13″ W | View this and other nearby images on: OpenStreetMap | 51.812400; -1.187000 |
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Licensing
editThis image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by David Hawgood and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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Attribution: David Hawgood
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current | 14:48, 31 January 2010 | 477 × 640 (185 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Azure damselflies in tandem on Otmoor. "They are Azure Damselflies (Coenagrion puella), which are very similar to Common Blue and also very common. The main difference is the shape of the marking at |
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Image title | OLYMPUS DIGITAL CAMERA |
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Camera manufacturer | OLYMPUS CORPORATION |
Camera model | X-3,C-60Z |
Exposure time | 1/160 sec (0.00625) |
F-number | f/5.6 |
ISO speed rating | 64 |
Date and time of data generation | 14:14, 5 June 2006 |
Lens focal length | 23.4 mm |
Orientation | Normal |
Horizontal resolution | 200 dpi |
Vertical resolution | 200 dpi |
Software used | CAMEDIA Master 4.2 |
File change date and time | 19:37, 5 June 2006 |
Y and C positioning | Co-sited |
Exposure Program | Creative program (biased toward depth of field) |
Exif version | 2.21 |
Date and time of digitizing | 14:14, 5 June 2006 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Custom image processing | Custom process |
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White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
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