Sharpe's lark
| Rufous-naped lark | |
|---|---|
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| Adult male M. a. transvaalensis | |
| Song recorded in Kiboko, Kenya | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Alaudidae |
| Genus: | Mirafra |
| Species: | M. africana |
| Binomial name | |
|
Mirafra africana Smith, 1836 |
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| Subspecies | |
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23, see text |
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| resident range | |
23, see text
The rufous-naped lark (Mirafra africana) or rufous-naped bush lark is a widespread and conspicuous species of lark in the lightly wooded grasslands, open savannas and farmlands of the Afrotropics. Males attract attention to themselves by their bold and repeated wing-fluttering displays from prominent perches, which is accompanied by a melodious and far-carrying whistled phrase. This rudimentary display has been proposed as the precursor to the wing-clapping displays of other bush lark species. They have consistently rufous outer wings and a short erectile crest, but the remaining plumage hues and markings are individually and geographically variable. It has a straight lower, and longish, curved upper mandible.
The rufous-naped lark is geographically very variable, and is taken to form a species complex with the allopatricred-winged lark of East Africa, and perhaps with the Somali lark. It is a smaller version of the first, with a finer bill and shorter tail, but their morphological and vocal features do not intergrade where their ranges meet. The rufous nape is an equivocal field character, being absent in the tropical races and in some individuals.
Due to the inherent variability of the species, some of the 23–25 odd races are perhaps insufficiently distinct or clinal. Consequently, M. a. rostrata and M. a. zuluensis are sometimes merged with M. a. africana, and M. a. okahandjae with M. a. pallida. On the other hand, a few taxa are arguably incipient or full species. The distinctly plumaged blackish lark comprises races M. a. nyikae and M. a. nigrescens, and is altitudinally isolated from M. a. transvaalensis in nearby Tanzania. Malbrant's lark, M. (a.) malbranti, which ranges from Gabon to Angola, has a fairly distinct display flight, but may intergrade with M. a. kabalii in Zambia.
Sharpe's lark, M. (a.) sharpii, of northwestern Somalia, has almost plain, coppery red upper parts and is sometimes (e.g., by Sibley and Monroe) regarded as a separate and endangered species. Its small range of some 21,200 km2 is impacted by overgrazing and conversion to croplands. It may however be conspecific with Somali lark, M. (a.) somalica, which differs by its very long bill and white edges to the outer tail feathers. The Somali lark is sometimes considered a race of rufous-naped lark, but is alternatively deemed a full species in Mirafra or Certhilauda.
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Wikipedia