The pin-tailed sandgrouse (Pterocles alchata) is a medium large bird in the sandgrouse family. It has a small, pigeon-like head and neck and a sturdy, compact body. It has long pointed wings, which are white underneath, a long tail and a fast direct flight. Flocks fly to watering holes at dawn. The call is a loud kattar-kattar. This gregarious species breeds on dry open treeless plains and similar habitats. Its nest is a ground scrape into which two or three cream-coloured eggs with cryptic markings are laid. Both sexes incubate the eggs.
The pin-tailed sandgrouse is about long. Its head and upperparts are yellowish-green. The underparts are white with a chestnut breast band separating the belly from the green neck. Sexes are somewhat similar, but the female is better camouflaged and has a shorter tail than the male. There are two subspecies; P. a. alchata breeds in southern Europe and P. a. caudacutus breeds in northwestern Africa, the Middle East and southeastern Asia. It is a partial migrant, with some Asian birds moving to the Middle East and northern Pakistan in winter. Males of the eastern race have duller underparts than the European birds, and the females have white, rather than yellow, wing coverts.
Taxonomy
There are two subspecies. The nominate race, P. a. alchata, breeds in Iberia and southern France, and the eastern form P. a. caudacutus (Gmelin, 1774) is found in northwest Africa, and from southeast Turkey east to Kazakhstan.
The species name alchata is thought to be derived from the Arabic name which is derived from the call of the bird.
Description
The pin-tailed sandgrouse is a robust, medium-sized bird about in length. The general colouring is cryptic, a blend of barred and flecked olive green, brown, buff, yellow, grey and black. The underparts and the feathered legs are dull white.
The female is generally similar to the male but the colours are duller. The cheeks and neck are golden-buff and lack the greenish tinge of the male. There is a black stripe running through the eye. The chin is white and there is an additional yellow-buff band across the breast with a broad black stripe above, another thinner one about a third of the way down and a further narrow black stripe at the base. The back and wings are grey, barred with black. The rump and the tail (which has shorter central feathers than the male) are similar in colouration to the male but have finer black barrings.
The pin-tailed sandgrouse inhabits open areas of stony land, semi arid areas at the edge of deserts, treeless plains and occasionally dried-out mud flats. In winter it may visit ploughed or fallow land but prefers sandy soils and is much less reliant on vegetation cover than the black-bellied sandgrouse (Pterocles orientalis) which has a similar range. It does not occur at elevations above about . The range may be expanding in south eastern Turkey, possibly as a result of changes in climate. However, the populations in parts of Europe are decreasing due to changes in agricultural production. The bird remains common in Spain but in the only remaining locality in southern France where it is found, at La Crau, only about 170 pairs remained in 2002, while there were fewer than 100 pairs of birds breeding in Portugal in the same year.