Чёрный дербник: описание и особенности вида

Species of bird
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The blackstart (Oenanthe melanura) is a chat found in desert regions in North Africa, the Middle East and the Arabian Peninsula. It is resident throughout its range. The blackstart is 14 cm long and is named for its black tail, which is frequently fanned; the rest of its plumage is bluish grey or grey brown (North African races being browner, Middle Eastern races bluer). The sexes are similar. The song is a clear melancholy whistle: CHURlee TRUloo CHURlee TRUlur , with short phrases from the song used as a call. The habitats of blackstarts are rocky deserts and mountain slopes; they nest in rock crevices lay 3–4 eggs. They feed on insects, taken mainly on the ground. The blackstart is a confident species, unafraid of people.

The blackstart is around in length with a wingspan of and a weight of around The nominate race O. m. melanura has blueish ash grey upperparts with darker wings and a black rump and tail. The belly and under wings are greyish white; the bill and legs are black. The sexes are similar. The North African subspecies O. m. lypura and O. m. airensis are browner than the nominate.

The blackstart is monogamous and pairs remain on their breeding territory throughout the year. The nest is a shallow cup of grass and leaves lined with hair and fine plant material. The female usually places small pebbles around the entrance of the nest. The 3 or 4 pale blue eggs with fine red brown speckles are laid at daily intervals. They measure and weigh They are incubated by the female and hatch after 13–14 days. The chicks are fed by both parents and fledge after around 14 days. Up to three broods can be raised in a year. A study conducted in Israel on the west shore of the Dead Sea found that a major cause of nest failure was the predation of the eggs by Golden and Cairo spiny mice.