Jackdaws


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Jackdaws

 

birds of the family Corvidae of the order Passeriformes. There are two closely related species: the common jackdaw (Corvus monedula) and the Daurian jackdaw (C. daurica).The body is 22-23 cm long and weighs 150-200g. The plumage is soft. The dorsal side is black with a metallic shine. In the common jackdaw the ventral side is grayish black, and in the Daurian jackdaw it is white or black. There is a white semicollar on the neck. The common jackdaw is found in Europe, Asia (excluding the extreme northern parts), and northeastern Africa, and in the eastern USSR as far as central Siberia. The Daurian jackdaw inhabits southern Siberia east of the Enisei, Mongolia, and China. Jackdaws are migratory and occasionally permanently settled birds. They are monogamous and nest in colonies in hollows of trees, rock clefts, and burrows in cliffs and on buildings. There is one clutch per year in April-May, consisting of three to six blue green eggs with dark speckles. Incubation lasts 16 days. After nesting, jackdaws stay in flocks and migrate. They feed on animals and plants and can be useful by eating insects.

References in periodicals archive ?
Ouellette and Thornton made this discovery by studying flocks of jackdaws, a gray-headed English cousin of the crow.
NATURE Jackdaws look after their own JACKDAWS are able to discriminate between each other's voices and respond in greater numbers to warnings from birds they know than from strangers, researchers have shown.
The tree is slowly dying and the top branches are used as a perch, mainly by jackdaws and mistle thrushes.
Rooks, Corvus frugilegus, and associated jackdaws, Corvus monedula, wintering in central and western Europe, use communal roosts.
Jackdaws Castle neighbour Chris brought TV 'bromance' pal Kem to Jonjo O'Neill's base, where stable staff not surprisingly became rather excited, although not nearly so excited as leading jockey Aidan Coleman.
Each morning flocks of pigeons, jackdaws and seagulls descend on Brenda Hawkins' lawn and wall when she puts out her seed mixture and other food.
The Jackdaws Castle handler enjoyed a longstanding association with the 20-times champion jockey since McCoy pledged his allegiances to prominent owner JP McManus in 2004.
Jonjo O'Neill has rather more grandiose ambitions this week as he readies Shutthefrontdoor for the main event, but the Jackdaws Castle handler can be trusted to have this one on top of his form.
FOR the more than 35 years I have lived in the middle of West Bromwich and during that time jackdaws have nested and roosted in my neighbours' disused chimneys.
JACKDAWS nesting in the chimneys of a historic Northumberland hall left staff feeling distinctly jumpy.
Off for 18 months before making his debut for the Jackdaws Castle trainer in October, Burton Port ran the best race since his absence when second at Newbury in first-time cheekpieces last month.
In a separate study, published in the journal Animal Cognition, the team investigated the ability of carrion crows to differentiate between the voices and calls of familiar and unfamiliar humans and jackdaws, or 'heterospecific individuals' ie.