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A photo of a Eurasian Blackcap (Sylvia atricapilla), male
Eurasian Blackcap, Male

Eurasian Blackcap

Sylvia atricapilla

The Eurasian blackcap, Sylvia atricapilla, is a common and widespread typical warbler known for its distinctive cap and melodious song. The species exhibits sexual dimorphism with males sporting a black cap and females a chestnut one. The upperparts are generally olive-grey, while the underparts are pale grey. This bird is small and agile, measuring around 13 cm in length with a wingspan of 7–8 cm.

Identification Tips

Males can be identified by their black caps and light grey underparts, while females have a reddish-brown cap and a slightly browner hue to their grey upperparts. Juveniles resemble females but have a rufous tinge to their upperparts and a more olive tone on the breast and flanks. The blackcap's tail is dark grey with an olive edge to each feather, and it has a grey bill and legs with a reddish-brown iris.

Habitat

The blackcap favors mature deciduous woodlands with a well-developed understory. It also occupies parks, large gardens, and overgrown hedges, provided there are tall trees for songposts and dense shrubs for nesting.

Distribution

This warbler breeds across much of Europe, western Asia, and northwestern Africa. It is a partial migrant, with northern populations wintering in northwestern Europe, around the Mediterranean, and in tropical Africa. Some have adapted to wintering in British and Irish gardens.

Behaviour

Blackcaps are territorial during the breeding season, with males establishing and defending their territories through song and display. They are mainly monogamous and may raise one to two broods per season. The species is known for its leap-frog migration pattern, where northern populations migrate further south than those from the Mediterranean.

Song & Calls

The male blackcap's song is a rich musical warble, often ending in a high-pitched crescendo. In isolated areas, a simpler song may be heard. Calls include a hard "tac-tac" and various squeaks and trills. The song is sometimes confused with that of the garden warbler but is slightly higher-pitched and more broken.

Breeding

Blackcaps typically build a neat cup-shaped nest in brambles or scrub, laying a clutch of 4–6 buff eggs with grey and brown markings. Both parents incubate the eggs and care for the altricial chicks, which fledge in about 11–12 days.

Similar Species

The blackcap can be confused with other dark-headed Sylvia species, such as the Sardinian and Orphean warblers, but these have more extensive black on the head and are larger with white tail edges.

Diet and Feeding

During the breeding season, blackcaps feed mainly on insects, switching to fruit in late summer. In winter, they consume small fruits and may rely on food provided in gardens, such as bread, fat, and peanuts.

Conservation Status

Despite pressures from hunting in the Mediterranean and natural predation, the blackcap has been expanding its range for decades and is classified by the International Union for Conservation of Nature (IUCN) as Least Concern. Its population is estimated to be between 101 and 161 million individuals globally.

Eurasian Blackcap Sounds



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