Аяқтар мен авосеттер тұқымдасы

Family of birds

The Recurvirostridae are a family of birds in the wader suborder Charadrii. It contains two distinct groups of birds, the avocets (one genus) and the stilts (two genera).

Avocets and stilts range in length from and in weight from ; males are usually slightly bigger than females. All possess long, thin legs, necks, and bills. The bills of avocets are curved upwards, and are swept from side to side when the bird is feeding in the brackish or saline wetlands they prefer. The bills of stilts, in contrast, are straight. The front toes are webbed, partially in most stilts, and fully in avocets and the banded stilt, which swim more. The sexes are similar. Their vocalizations are usually yelps of one or two syllables.

Avocets and stilts are a cosmopolitan family, being distributed on all the world's continents except Antarctica, and occurring on several oceanic islands. Several species are wide ranging and a few are locally distributed. One species, the black stilt of New Zealand, is critically endangered due to habitat loss, introduced predators, and hybridisation with the pied stilt.

These species feed on small aquatic animals such as mollusks, brine shrimp and other crustaceans, larval insects, segmented worms, tadpoles, and small fish.

Stilts and avocets breed on open ground near water, often in loose colonies. They defend nesting territories vigorously with aggressive displays, and mob intruders and possible predators with a great deal of noise. They are monogamous, although the pair bonds are not maintained from season to season. Their eggs are light coloured with dark markings, weighing Three to four are laid in simple nests, and both parents share the incubation duties, which last 22 to 28 days. The banded stilt may breed only every few years, as it breeds on temporary lakes caused by rains in the deserts of Australia. The chicks are downy and precocial, leaving the nest within a day of hatching; they fledge in 28 to 35 days. In all species except the banded stilt, the chicks are cared for by the parents for several months, and they may move them to new areas and defend territories there. Banded stilts deviate from this by collecting their chicks in massive crèches numbering several hundred.

The taxonomy of the stilts is particularly debated, with the genus Himantopus considered to have two to six species. Species in the family Recurvirostridae Common and binomial names Image Range Notes Banded stiltCladorhynchus leucocephalus southern Australia Black winged stiltHimantopus himantopus Europe, Asia and Africa Sometimes includes pied (H. leucocephalus), white backed (H. melanurus) and black necked stilts (H. mexicanus) as subspecies Pied stiltHimantopus (himantopus) leucocephalus Southeast Asia to Australia and New Zealand White backed stiltHimantopus (himantopus/mexicanus) melanurus South America Black necked stiltHimantopus (himantopus) mexicanus North America to northern South America, and Hawaii Includes Hawaiian stilt (H. m. knudseni) and sometimes also white backed stilt (H. melanurus) as subspecies Black stiltHimantopus novaezelandiae South Island of New Zealand American avocetRecurvirostra americana North America Andean avocetRecurvirostra andina Andes in South America Pied avocetRecurvirostra avosetta Europe, Asia and Africa Red necked avocetRecurvirostra novaehollandiae Australia