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Karoo Scrub-Robin Cercotrichas coryphoeus Scientific name definitions

Nigel Collar
Version: 1.0 — Published March 4, 2020
Text last updated March 19, 2019

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Field Identification

15–17 cm; 19–22 g. Nominate race is dull grey-brown above and below, with white supercilium , narrow white sub­ocular crescent, whitish chin and throat, greyish malar to breast and neck side, blackish wings, black tail with white tips of outer feathers; dull brownish-buff breast tinged greyish-olive; bill and legs black. Sexes similar. Juvenile is barred dusky above and below. Race <em>cinerea</em> is slightly paler and greyer above and below .

Systematics History

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

Race abbotti (R Fish, SW Namibia) treated here as synonym of nominate. Species name previously listed as coryphaeus, but original spelling recently demonstrated to be coryphoeus (1). Two subspecies recognized.

Subspecies


SUBSPECIES

Cercotrichas coryphoeus coryphoeus Scientific name definitions

Distribution

C and S Namibia, W and C South Africa (E to W Free State and Eastern Cape) and W Lesotho.

SUBSPECIES

Cercotrichas coryphoeus cinerea Scientific name definitions

Distribution

SW Western Cape.

Distribution

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.

Habitat

Scrub, with interspersed bare ground for foraging: Karoo scrub, drier fynbos such as renosterveld, strandveld dune scrub, mixed deciduous and evergreen hillside bush, thorn thickets 3–5 m tall, scrub along gulleys, farmstead gardens. In more arid habitats prefers areas where lusher vegetation at least 1 m high, including stands of tamarisk (Tamarix usneoides). Avoids herbaceous cover, areas of deep sand, and mountainsides.

Movement

Resident; occasional short-distance vagrancy.

Diet and Foraging

Insects and fruit: ants, beetles (Chrysomelidae, Curculionidae, Elateridae, Scarabaeidae, Tenebrionidae), flies (Muscidae, Sepsidae), small grasshoppers and small parasitic wasps; also seeds and fruits of Lycium. Stomachs of 21 birds from throughout year in Free State (South Africa) held, by number, 55% ants, 22% seeds, 14% beetles, 4% berries, 4% termites and 1% bugs. Forages on ground; opportunistically hawks passing insects in flight. In coastal strandveld scrub (fynbos), seen to forage on small sandy beaches among washed-up seaweed.

Sounds and Vocal Behavior

Song (confined to breeding season) a series of unmusical husky irregular stutters, chirrups and chirps, mixing whistles and guttural notes, sometimes involving weak mimicry and generally reminiscent of an Acrocephalus reed warbler. Calls include “skizzlezit” or “zittery” for contact and challenge, also grating “chukkaruk, chukkaruk”; sizzling chatter when mobbing; abrupt “tshiek” in alarm; regular harsh “swaynk, swaynk, swaynk” when nest disturbed; and rapid stuttering “tsik, tsik, tsik” when with fledged young.

Breeding

Generally Jul–Dec, earliest in W, peak laying in Sept–Oct; Aug–Feb (peak Nov) in Namibia; no evidence of double-brooding. Territory c. 0·5 ha. Commonly has helpers at nest. Nest an open, often deep cup, sometimes neat, sometimes loose, made of coarse dead twigs, bark flakes, dry grass, tendrils and rootlets, lined with dry grass, leaf parts, moss or animal hair, placed on ground (when generally with ramp of thick dry twigs at access point), very occasionally up to 1 m up in shrub, bankside or low tree hole. Eggs 2–4 (average of 24 clutches 2·4), pale greenish-blue with reddish-brown and purplish-grey speckling and spotting; incubation period 13–15 days; nestling period 13–14·5 days; post-fledging dependency at least 3 weeks. Rare records of brood parasitism by Diederik Cuckoo (Chrysococcyx caprius). Nest failure common.
Not globally threatened. Common. Ubiquitous in strandveld in coastal Namaqualand and SW Cape.

Recommended Citation

Collar, N. (2020). Karoo Scrub-Robin (Cercotrichas coryphoeus), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.kasrob2.01
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