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Jackdaw

Eurasian Jackdaw Jackdaw Both Sexes
Glossy black with grey nape and ear coverts.
Distribution map - when and where you are most likely to see the species.
Corvus monedula
Length: 33 cm  (13")
Wing Span: 67-74 cm  (27-30")
Weight: 220-270 g  (8-9 oz)
Breeding Pairs: 390 000
Present: All Year
Status: Green
Description   Voice   Feeding   Nesting   Movements   Conservation   My Garden  
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Description

The Jackdaw is our smallest crow - smaller than a Carrion Crow or Rook, but about the same size as a Jay. Like all the crows, Jackdaws are inquisitive and intelligent birds.

Adult Jackdaws are all black apart from their grey nape, shoulders and ear-coverts and light grey (almost white) eyes. The bill and legs are black.

Juvenile birds have a less prominent grey nape, etc. Their eyes are a pale blue in the first year, turning to brown in the spring of their second year and eventually to light grey.

Compared with the other crows, its flight is more hurried - similar to a pigeon.

Flight Silhouettes and Comparative Sizes

Voice

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Their call is a high-pitched metallic sounding "kyow" or "tchack", after which it is named.

Feeding

The Jackdaws diet is greatly varied:

While on holiday (1998), I noticed young Jackdaws picking dead insects off the front bumpers and registration plates of cars parked in a car park (Dolgellau, Wales). One youngster, at the rear of a car, seemed quite puzzled and tormented by the absence of dead flies!

Nesting

Jackdaws will take over old nests of larger birds or use holes in trees and buildings. The nest is made from twigs and lined with hair, rags, bark, soil, and many other materials. Jackdaws nest in colonies and often close to Rooks.

The smooth, glossy pale blue eggs are marked with blackish-brown, and approximately 36 mm by 26 mm. The female incubates the eggs by herself. After the young hatch, they are fed by both parents.

Breeding Data
Breeding Starts Number of Clutches Number of Eggs Incubation (days) Fledge (days)
late April 1 4-6 17-18 28-32

Movements

British birds are mostly resident, though upland breeding birds migrate south and west to lowland regions and Ireland for the winter. Meanwhile, the wintering population is increased by immigrants from northern Europe, which arrive along the east coast in the autumn.

Conservation

Jackdaws are thriving and this is largely a result of improved breeding performance and the Jackdaw's diverse diet.

My Garden

We have never seen Jackdaws in our garden, but they often flyover, especially at dusk and dawn in the winter months, as they commute between their night-time roosting and daytime feeding grounds.


Last revision: 01 Jul 2010
Copyright © David Gains 1999-2014.
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