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|From Wikipedia, the free encyclopedia|
The Great Cormorant is a large black bird, but there is a wide variation in size in the species wide range. Weight is reported from 1.5 kg (3.3 lbs) to 5.3 kg (11.7 lbs), with a typical range from 2.6 to 3.7 kg (5.7-8.2 lbs). Length can vary from 70 to 102 cm (28-40 in) and wingspan from 121 to 160 cm (48-63 in). It has a longish tail and yellow throat-patch. Adults have white thigh patches in the breeding season. In European waters it can be distinguished from the Common Shag by its larger size, heavier build, thicker bill, lack of a crest and plumage without any green tinge.
In eastern North America, it is similarly larger and bulkier than Double-crested Cormorant, and the latter species has more yellow on the throat and bill.
The Great Cormorant breeds mainly on coasts, nesting on cliffs or in trees (which are eventually killed by the droppings), but also increasingly inland. 3-4 eggs are laid in a nest of seaweed or twigs.
The Great Cormorant can dive to considerable depths, but often feeds in shallow water. It frequently brings prey to the surface. A wide variety of fish are taken: cormorants are often noticed eating eels, but this may reflect the considerable time taken to subdue an eel and position it for swallowing, rather than any dominance of eels in the diet. In British waters, dive times of 20–30 seconds are common, with a recovery time on the surface around a third of the dive time.
The Great Cormorant is one of the few birds which can move its eyes, which assists in hunting.
Many fishermen see in the Great Cormorant a competitor for fish. Because of this it was nearly hunted to extinction in the past. Thanks to conservation efforts its numbers increased. At the moment there are about 1,2 million birds in Europe (based on winter counts. Late summer counts would show higher numbers). Increasing populations have once again brought the cormorant into conflict with fisheries. For example, in Britain, where inland breeding was once uncommon, there are now increasing numbers of birds breeding inland, and many inland fish farms and fisheries now claim to be suffering high losses due to these birds. In the UK each year some licences are issued to shoot specified numbers of cormorants in order to help reduce predation, it is however still illegal to kill a bird without such a licence.
Chinese fishermen sometimes tie fishing line around the throats of cormorants, tight enough to prevent swallowing, and deploy them from small boats. The cormorants "eat" fish without being able to fully swallow them, and the fishermen are able to retrieve the fish simply by forcing open the cormorants' mouths, apparently engaging the regurgitation reflex. This traditional fishing method is known as Cormorant fishing. In Norway cormorants is a traditional game bird. Each year ca. 10,000 cormorants are shot to be eaten.In North Norway, cormorants are traditionally seen as semi-sacred.It is regarded as good luck to have cormorants gather near your village or settlement. An old legend states that people who die far out at sea, their bodies never recovered, spend eternity on the island Utrøst - which can only occasionally be found by mortals. The inhabitants of Utrøst can only visit their homes in the shape of cormorants.
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- [2011-06-12 23:43]
wonderful species great colors, good contrast. thanks for sharing.
O imagine foarte frumoasa.Claritate foarte buna, culori frumoase naturale si un fundal,albastru, excelaent.Foarte frumos!
Fine capture of this Great Cormorant in flight Razvan ...how are you?
The simplicity and the clarity in this shot are brilliant! Good natural colors and classical framing!
O captura in zbor bine realizata cu detalii frumos redate si culori naturale.
Another beautiful in flight photo with very good composition, wonderful colours and good sharpness.
I love photos of birds in flight, and this is a very good example.
Good framing, good sharpness and detail.