The Cambridge natural history, Vol. 09 (of 10)Evans, A. H. (Arthur Humble)
Science
The Cambridge natural history, Vol. 09 (of 10)
Evans, A. H. (Arthur Humble)
Animals; Birds
The genus _Cursorius_, or Courser, inhabits the hotter portions of the Old
World. _C. gallicus_, the Cream-coloured Courser, which visits Britain and
the southern half of Europe irregularly, is met with in the Canary and Cape
Verd Islands, North Africa, and the countries from Arabia to Northern
India. The brown bill is thick and decurved, the whitish legs are long; the
plumage is buff, with slaty nape, black remiges, axillaries, under
wing-coverts, and subterminal tail-bar; the face is white with a black
post-ocular streak. Seldom found in flocks, this bird frequents dry sandy
plains and deserts, crouching to avoid notice, running with extraordinary
speed if approached, but rarely rising on the wing. The flight, however, is
at times protracted. The food consists almost entirely of insects, such as
grasshoppers, yet it includes small molluscs; the note is harsh; while two,
or exceptionally three, round stone-coloured eggs with grey and brown
markings are deposited on the bare ground. The axillaries and under
wing-coverts are greyish-buff in _C. somalensis_, of Somaliland, but
brownish-grey in _C. {295}rufus_, of South Africa, which has a black
abdominal patch. _C. temmincki_ (_senegalensis_), of most of the Ethiopian
Region, and _C. coromandelicus_, of India and Ceylon, are similar, but have
the nape black and white, the latter possessing white tail-coverts.
In the remaining species (_Rhinoptilus_ of some authors) the bill is almost
straight. _C. bicinctus_ of South Africa is mottled with brown above,
having much chestnut on the wings, white tail-coverts, and buff under parts
crossed by two black pectoral bars. _C. bisignatus_, ranging from East
Africa to Benguela, and _C. hartingi_ of Somali-Land, are hardly more than
races of the above. _C. cinctus_ of East Equatorial Africa, and the barely
separable _C. seebohmi_ of South-West Africa, are easily recognised by the
four bands on the white lower surface, the highest and lowest being brown,
and the two intermediate black, with a streaky buff space between them. _C.
chalcopterus_, of the Ethiopian Region generally, and _C. albifasciatus_
with a more distinct white alar bar, are plain brown birds with metallic
purple hues on the black primaries, white post-ocular streak and throat,
and white belly surmounted by a black band. _C. bitorquatus_, of the
districts near Madras, differs in shewing below three successive bands or
gorgets, one of rufous and two of brown, separated by white. Though all
Coursers agree in general habits, the last three seem to prefer bushy
ground, and _C. rufus_ will perch in trees.
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