Black-crowned tchagra

Black-crowned tchagra
Song recorded in Kiboko, Kenya
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Malaconotidae
Genus: Tchagra
Species: T. senegalus
Binomial name
Tchagra senegalus
(Linnaeus, 1766)
Synonyms
  • Tchagra senegala

The black-crowned tchagra (Tchagra senegalus) is a bushshrike. This family of passerine birds is closely related to the true shrikes in the family Laniidae, and was once included in that group.

This species is found in the Arabian peninsula and most of Africa in scrub, open woodland, semi-desert and cultivation.

Description

Adults have a solid black crown, bordered by buff superciliary stripes, but juveniles have a brownish crown.[2]

The black-crowned tchagra is a colourful and unmistakable species, 19–22 cm in length. It has a black crown and eye stripes separated by a broad white supercilium. The underparts are pale grey and the upperparts pale brown. The folded wings are chestnut and the tail is black, tipped white. The bill is black.

Sexes are similar, but young birds have a brown cap and a pale yellow bill. There are 14 subspecies, varying in size and the colour of the back, underparts and eyestripe.

Black-crowned tchagra has a descending whistling song, chee-chee chee cheroo cheroo, and can be readily tempted into sight by imitating this call, presumably because the bird is concerned that there is an intruder in its territory. The male also has a switchback display flight.

Behaviour

Black-crowned tchagra lays two or three heavily marked white eggs in a cup nest in a tree or bush. Both sexes, but mainly the female, incubate for 12–15 days to hatching; the chicks fledge after another 15 days.

It is similar in habits to the shrikes, hunting insects and other small prey from a perch in a bush, although it sits less conspicuously than true shrikes.

References

  1. ↑ BirdLife International (2012). "Tchagra senegalus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  2. ↑ Zimmerman, Dale A.; et al. (1999). Birds of Kenya and Northern Tanzania. Princeton University Press. p. 216-217, 613. ISBN 0691010226.
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