blackcap

Blackcap
Adult male
Conservation status
Least Concern (IUCN 3.1)
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Aves Order: Passeriformes Family: Sylviidae Genus: Sylvia Species: S. atricapilla
Binomial name
Sylvia atricapilla (Linnaeus, 1758, Sweden)

The Blackcap, Sylvia atricapilla, is a common and widespread sylviid warbler which breeds throughout northern and temperate Europe. Its color pattern is unique in the genus Sylvia; the Blackcap's closest living relative is the Garden Warbler which looks different but has very similar vocalizations. These two, whose ranges extend farther northeastwards than other Sylvia, seem to form sister species well distinct from the other typical warblers (Helbig 2001, Jønsson & Fjeldså 2006).

It is a robust typical warbler, mainly grey in plumage. Like most Sylvia species, it has distinct male and female plumages: The male has the small black cap from which the species gets its name, whereas in the female the cap is light brown. This is a bird of shady woodlands with ground cover for nesting. The nest is built in a low shrub, and 3–6 eggs are laid. The song is a pleasant chattering with some clearer notes like a Blackbird. This full song can be confused with that of the Garden Warbler, but in the Blackcap, it characteristically ends with an emphatic fluting warble. Especially in isolated Blackcap populations (such as in valleys or on peninsulas and small islands), a simplified song can occur. This song is said to have a Leiern-type ("drawling") ending after the term used by German ornithologists who first described it. The introduction is like that in other Blackcaps, but the final warbling part is a simple alteration between two notes, as in a Great Tit's call but more fluting (Snow et al. 1998).

One subspecies of the Blackcap, S. a. heineken, is very prone to melanism. Its exact extent of occurrence is not altogether clear; it is typically found on Madeira but might inhabit all Macaronesian islands as well as the Atlantic coasts of Iberia and Northwest Africa (Snow et al. 1998). The melanistic birds, S. a. heineken morpha obscura, were at first considered a distinct subspecies.

This small passerine bird is migratory, and northern and central European breeders winter in southern Europe and north Africa where the local populations are resident. It is hardier than most warblers, partly because it will readily eat small berries as well as the more typical warbler diet of insects.

In recent years, substantial numbers of central European birds have taken to wintering in gardens in southern England. Presumably the ready availability of food, particularly from bird tables, and the avoidance of migration over the Alps compensate for the sub-optimal climate. Bearhop et al. (2005) reported that birds wintering in England tend to mate only among themselves, and not usually with those wintering in the Mediterranean. This is because the short-distance migrants arrive back from the wintering grounds for breeding earlier than birds wintering around the Mediterranean, and of course have spent the winter together, when pair-bonds are initiated. The authors point out that division of a population by different migration routes can be a first step towards speciation.

Cultural references

The presence and sounds of this bird have since long inspired Italian writers. "La Capinera" (Italian for Blackcap) is the title of one of the most famous poems by Giovanni Pascoli. Storia di una capinera [1] is a 1993 movie directed by Franco Zeffirelli and distributed with the international title "Sparrow".

The Blackcap is considered a delicacy in some Mediterranean countries where many of these birds are illegally trapped and killed every year^[1].

The Blackcap's call symbolises St Francis in Messiaen's opera, Saint-François d'Assise.

Gallery illustrating various views and plumages

Adult male

Male gathering nesting material

Adult female

References

1. ^ 1

• Bearhop, Stuart; Fiedler, Wolfgang; Furness, Robert W.; Votier, Stephen C.; Waldron, Susan; Newton, Jason; Bowen, Gabriel J.; Berthold, Peter & Farnsworth, Keith (2005): Assortative mating as a mechanism for rapid evolution of a migratory divide. Science 310(5747): 502-504. doi:10.1126/science.1115661 (HTML abstract) Supporting Online Material

• BirdLife International (2004). Sylvia atricapilla. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 12 May 2006. Database entry includes justification for why this species is of least concern

• Helbig, A. J. (2001): Phylogeny and biogeography of the genus Sylvia. In: Shirihai, Hadoram: Sylvia warblers: 24-29. Princeton University Press, Princeton, N.J. ISBN 0-691-08833-0

• Jønsson, Knud A. & Fjeldså, Jon (2006): A phylogenetic supertree of oscine passerine birds (Aves: Passeri). Zool. Scripta 35(2): 149–186. doi::10.1111/j.1463-6409.2006.00221.x (HTML abstract)

• Snow, David W.; Perrins, Christopher M.; Doherty, Paul & Cramp, Stanley (1998): The complete birds of the western Palaearctic on CD-ROM. Oxford University Press. ISBN 0-19-268579-1

• [1] http://www.bbc.co.uk/wales/nature/sites/wildlife/pages/blackcaps.shtml

External links

Wikispecies has information related to: Sylvia atricapilla

Wikimedia Commons has media related to: Sylvia atricapilla

• Blackcap videos on the Internet Bird Collection
• Madeira Birds: Blackcap
• Ageing and sexing (PDF) by Javier Blasco-Zumeta
• Avibase