The Eurasian wryneck (Jynx torquilla) is a species of wryneck in the woodpecker family. This species mainly breeds in temperate regions of Europe and Asia. Most populations are migratory, wintering in tropical Africa and in southern Asia from Iran to the Indian Subcontinent, but some are resident in northwestern Africa. It is a bird of open countryside, woodland and orchards.
Eurasian wrynecks measure about 16.5 cm (6.5 in) in length and have bills shorter and less dagger-like than those of other woodpeckers. Their upperparts are barred and mottled in shades of pale brown with rufous and blackish bars and wider black streaks. Their underparts are cream speckled and spotted with brown. Their chief prey is ants and other insects, which they find in decaying wood or on the ground. The eggs are white as is the case with many birds that nest in holes and a clutch of seven to ten eggs is laid during May and June.
These birds get their English name from their ability to turn their heads through almost 180 degrees. When disturbed at the nest, they use this snake-like head twisting and hissing as a threat display. This odd behaviour led to their use in witchcraft, hence to put a "jinx" on someone.
The Eurasian wryneck sometimes forms small groups during migration and in its winter quarters but in the summer is usually found in pairs. It characteristically holds its head high with its beak pointing slightly upwards. A mutual display that occurs at any time of year involves two birds perched facing each other with their heads far back and beaks wide open, bobbing their heads up and down. Sometimes the head is allowed to slump sideways and hang limply. On other occasions, when excited, the head is shaken and twisted about violently. When disturbed on the nest or held in the hand, the neck contorts and twists in all directions. The bird sometimes feigns death and hangs limply with eyes closed
On returning to the breeding area after migration, the birds set up territories. On farmland in Switzerland it has been found that old pear orchards with large numbers of ant nests are preferentially selected over other habitata. Areas used for vegetable cultivation provided useful habitat when they include areas of bare ground on which the birds can forage. Territories are not chosen at random as arriving birds favoured certain areas over others with the same territories being colonised first year after year. The presence of other Eurasian wrynecks in the vicinity is also a positive influence. Orchards in general, and older ones in particular, provide favoured territories, probably because the dense foliage is more likely to support high numbers of aphids and the ground beneath has scant vegetation cover, both of which factors increase the availability of ants, the birds' main prey. Despite some territories being consistently chosen over others, reproductive success in these territories was no higher than in others.[13] Limiting factors for such crevice-nesting species as Eurasian wrynecks are both the availability of nesting sites and the number of ants and their ease of discovery. Modern farming practices such as the removal of hedges, forest patches and isolated trees and the increasing use of fertilisers and pesticides are disadvantageous to such birds.
The diet of the Eurasian wryneck consists chiefly of ants but beetles and their larvae, moths, spiders and woodlice are also eaten. Although much time is spent in the upper branches of trees, the bird sometimes perches in low bushes and mostly forages on the ground, moving around with short hops with its tail held in a raised position. It can cling to tree trunks, often moving obliquely, and sometimes pressing its tail against the surface as a prop. It does not make holes in bark with its beak but picks up prey with a rapid extension and retraction of its tongue and it sometimes catches insects while on the wing. Its flight is rather slow and undulating.
The nesting site is variable and may be in a pre-existing hole in a tree trunk, a crevice in a wall, a hole in a bank, a sand martin's burrow or a nesting box. In its search for a safe, protected site out of reach of predators, it sometimes evicts a previous occupant, its eggs and nestlings. It uses no nesting material and a clutch of normally seven to ten eggs is laid (occasionally five, six, eleven or twelve). The eggs average 20.8 by 15.4 millimetres (0.82 in × 0.61 in) and weigh about 0.2 g (0.007 oz). They are a dull white colour and partially opaque. Both sexes are involved in incubation which takes twelve days, but the female plays the greater part. Both parents feed the chicks for about twenty days before they fledge. There is usually a single brood. from Wikipedia, the free encyclopedia
Photos and videos Meneou by George Konstantinou
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