File:Stuutje1979 Black-headed Gull 1.JPG
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Summary
[edit]DescriptionStuutje1979 Black-headed Gull 1.JPG |
English: The Black-headed Gull (Chroicocephalus ridibundus) is a small gull which breeds in much of Europe and Asia, and also in coastal eastern Canada. Most of the population is migratory, wintering further south, but some birds in the milder westernmost areas of Europe are resident. Some birds will also spend the winter in northeastern North America, where it was formerly known as the Common Black-headed Gull. As is the case with many gulls, it had previously been placed in the genus Larus.
This gull is 38–44 cm (15-17½ in) long with a 94–105 cm (37–41 in) wingspan. In flight, the white leading edge to the wing is a good field mark. The summer adult has a chocolate-brown head (not black, despite the name), pale grey body, black tips to the primary wing feathers, and red bill and legs. The hood is lost in winter, leaving just dark vertical streaks. This is a noisy species, especially in colonies, with a familiar "kree-ar" call. Its scientific name means "laughing gull". It breeds in colonies in large reedbeds or marshes, or on islands in lakes, nesting on the ground. Like most gulls, it is highly gregarious in winter, both when feeding or in evening roosts. It is not a pelagic species and is rarely seen at sea far from coasts. The Black-headed Gull is a bold and opportunist feeder and will eat insects, fish, seeds, worms, scraps and carrion in towns, or take invertebrates in ploughed fields with equal relish. This species takes two years to reach maturity. First-year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less fully developed dark hood. Like most gulls, Black-headed Gulls are long-lived birds, with a maximum age of 63 years recorded in the wild. |
Date | |
Source | Own work |
Author | Stuutje1979 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:25, 1 July 2012 | 4,608 × 3,072 (5.09 MB) | Stuutje1979 (talk | contribs) |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D3100 |
Exposure time | 1/500 sec (0.002) |
F-number | f/5.6 |
ISO speed rating | 320 |
Date and time of data generation | 14:02, 29 June 2012 |
Lens focal length | 280 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.01 |
File change date and time | 14:02, 29 June 2012 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 14:02, 29 June 2012 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
DateTime subseconds | 60 |
DateTimeOriginal subseconds | 60 |
DateTimeDigitized subseconds | 60 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 420 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |