Description
The glossy black plumage and the orange-yellow bill and eye ring of the mature male Blackbird makes it easily recognisable. The male has Glossy black plumage with orange-yellow bill while the female has Dark brown plumage with faintly spotted breast.
The mature female has dark-brown upper parts and under parts, and yellow-brown bill. The under parts are are speckled and she usually has a pale throat.

The juveniles are reddish-brown (rufous) with paler spotting that is similar to that of the adult female but more spotted and redder. After the juvenile female moults, late summer to autumn, she is indistinguishable from an older female. However, while the juvenile male moults his wing feathers will remain brown (known as a 1st-winter male), also the eye ring and bill will be a "dirty" yellow, and it will be another year before his plumage is entirely black, and his eye ring and bill are pure orange-yellow.
Albinism is common in Blackbirds, but there are even more that are "partially albino"
The winter population grows manifold (up to 20 million) as resident birds are joined by those migrating from Scandinavia and Northern Europe. Many of the migrants have duller bills.

In bygone times Blackbirds and other song birds were a delicacy, a fact we are reminded of in the rhyme:

Sing a song of sixpence a pocket full of rye
Four-and-twenty Blackbirds baked in a pie
When the pie was opened the birds begin to sing
Oh wasn't that a dainty dish to set before the King

Voice
The Blackbird sings from a perch and it's song is rich, varied and flute-like, but usually finishes in a squeaky phrase. Their calls are loud and varied. The warning call is given with flicking wings and tail and sounds a little like "chook", and the alarm call is a loud rattle.

During the winter, Blackbirds can often be heard quietly "singing to themselves" within undergrowth, this is called sub-song. Later, in the spring and summer, the male Blackbird sings from a prominent song post. After July, when breeding season is over, the male Blackbird stops singing and will not be heard properly again until February.

Feeding
The Blackbird feeds on insects and earthworms taken from the ground either by probing the ground, such as a lawn, or noisily turning over leaf litter with its bill.
Like the Song Thrush, the Blackbird often runs across the garden, pauses briefly before taking some food, then runs back to cover. Unlike the Song Thrush it rarely eats snails, though there are increasing reports of Blackbirds stealing snails that Song Thrushes have cracked open.

More unusual food has included Blackbirds taking tadpoles, newts, and small fish.
In the autumn they will often spend much time eating cotoneaster berries and windfall fruits (e.g. apples), which they will aggressively defend from other birds.
The Blackbird will feed off the ground or from a ground table, taking sultanas and raisins, and kitchen scraps.

Breeding
The nest is an untidy cup built by the female from vegetation, such as grass and twigs, and bound together with mud and finer grasses. The nest is usually in a hedge or bush, though they will use shelves in huts and other outbuildings.
The nesting attempts of Blackbirds, and other species that nest in open nests, often end in failure through inexperienced birds deserting the nest, cold weather and predation by cats, crows and birds of prey. In fact, it is estimated that as many as 9 out of 10 nesting attempts end in failure.
The smooth, glossy eggs are light greenish-blue with reddish-brown spots, and approximately 29 mm by 22 mm. The female incubates the eggs by herself. After the young hatch, they are fed by both parents.

Comments
A Medium BTO Alert has been issued for Blackbirds because numbers have fallen by over a third since the 1970's, especially in rural areas.

Reproduced with kind permission of

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Last modified: Tuesday April 15, 2008