Cape Grassbird
Sphenoeacus afer
A chunky, streak-backed warbler with a rusty head and wings, a ragged rufous tail, and black moustache stripes. It avoids woodland and trees, preferring rank areas with long grass, scrubby edge, and wet heathland (fynbos). It hops and clambers through dense brush and thickets, then flies low on rapidly-beating wings in labored flight to the next bush, immediately diving into cover. But it will also perch on prominent tall shrubs, like proteas, and sing its melodious tinkling jumbled song that starts softly and gets progressively louder. It also has a distinctive flat mewing “meeeeep” call. The Moustached Grass-Warbler is similar to the Cape Grassbird, but it has a plain unstreaked back, a broad black tail, and a pale eye.
Identification
The Cape grassbird is 19 to 23 cm (7.5 to 9.1 in) long and weighs 27–34 g (0.95–1.20 oz). Its crown and face sides are rufous, except for white around the eye, and it has black malar and moustachial stripes on its white throat. The upperparts are brown with heavy streaking and the long tail is a lighter brown while the underparts are whitish with blackish spotting. The sexes are similar, but the juvenile has a streaked cap and is duller than the adult. The song is jangling and musical, and the call is a nasal pheeeo.<p>The long, pointed, straggly tail, chestnut cap and facial stripes are diagnostic of Cape grassbird. It is much larger than any cisticola, and the heavily streaked back and the pointed tail eliminate confusion with moustached grass warbler.
Taxonomy
The Cape grassbird was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the flycatchers in the genus Muscicapa and coined the binomial name Muscicapa afra. Gmelin based his description on the "spotted yellow flycatcher" from the Cape of Good Hope that had been described in 1783 by the English ornithologist John Latham in his book A General Synopsis of Birds. The Cape grassbird is now the only species placed in the genus Sphenoeacus that was introduced in 1841 by the English naturalist Hugh Strickland. The genus name combines the Ancient Greek sphēn meaning "wedge" with oiax meaning "helm". The specific epithet afer is Latin meaning "African". <p>Four subspecies are recognised:<p>The Cape grassbird was formerly placed in the family Sylviidae. Within the family Macrosphenidae the moustached grass warbler (Melocichla mentalis) and the Cape grassbird are sister species.
- Scientific name
- Sphenoeacus afer
- Authority
- (Gmelin, JF, 1789)
- Order
- Passeriformes
- Family
- Macrosphenidae
- Genus
- Sphenoeacus
Range and habitat
The Cape grassbird breeds in southern Africa in South Africa, Lesotho, Mozambique and Swaziland with an isolated population in eastern Zimbabwe. It is a common species of coastal and mountain fynbos and long, rank grass on mountain slopes or in river valleys.
- Migration
- Resident species
Behavior
Migration pattern: Resident species.
Conservation
Population trend: declining.
- Population trend
- declining
Photos
Distribution
Bird Calls
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