Black-cap

Description:

The Blackcap is a warbler with a distinctive black or red-brown cap (crown and forehead), and a little smaller than a House Sparrow.

The male has grey-brown upper parts, pale grey underparts, and a glossy black cap. The female is similar but has browner upperparts, buff underparts, and a red-brown cap.

Juveniles are similar to the adult female, except the juvenile male has black-brown cap and the juvenile female a yellow-brown cap.

The Blackcap can be easily confused with the Garden Warbler. They are very similar in appearance with the Blackcap's cap being the easiest distinguishing feature. Their songs are very similar, but the Garden Warbler's song is often longer lasting with shorter pauses.

Blackcaps are predominantly summer visitors from Iberia and West Africa, however, there are an increasing number over-wintering in Britain, but many of these are birds that bred in northern or central Europe, e.g. Scandinavia and Germany. The increase in the numbers wintering here may be a result of milder winters, but also the relative abundance of food in the UK, i.e. berries and bird feeders. The UK wintering population steals an advantage over those that still choose to winter in Iberia and Africa, by getting back to their breeding grounds sooner and having used less energy to get there.

Voice:

The Blackcap's alarm call, "tacc", sounds like two pebbles striking one another. Its song is rich and varied warble, usually starting with a chattering and finishing with a flourish of flute-like notes.

Feeding

Blackcaps usually pick insects, such as caterpillars, flies and spiders from among the shrubs and trees during the breeding season. At other times, and particularly in the winter, they feed on fruit, such as berries.

They will sometimes visit bird tables in the winter, and they may feed from suet bars, especially those impregnated with dried flies.

Breeding

The nest is a neat cup built by the female from vegetation and mud and is usually in a hedge, bush, or brambles, though they will use shelves in huts and other outbuildings.

The eggs are about 20 mm by 15 mm. They are smooth and glossy, and pale buff with dark markings. Both adult birds share the duty of incubating the eggs as well as feeding the altricial young once they have hatched.

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