Jabiru

Identificazione

The jabiru is the tallest flying bird found in South America and Central America, often standing nearly the same height as the flightless and thus much heavier greater rhea. For the continent, it also has the second largest wingspan, after the Andean condor (that is, excluding the great albatross occasionally found off the coast of southern South America). The adult jabiru is 120–140 cm (47–55 in) long, 2.3–2.8 m (7.5–9.2 ft) across the wings, and can weigh 4.3–9 kg (9.5–19.8 lb). Sexual dimorphism is high, possibly the highest of any stork, with males being about 25% larger than females. Males weigh an average of 6.89 kg (15.2 lb) whereas females weigh an average of 5.22 kg (11.5 lb). Large males may stand as tall as 1.53 m (5.0 ft). The beak, which measures 25–35 cm (9.8–13.8 in), is black and broad, slightly upturned, ending in a sharp point. Among other standard measurements, the tail measures 20–25 cm (7.9–9.8 in), the tarsus measures 28.5–39 cm (11.2–15.4 in) long and the wing chord measures 58.5–73 cm (23.0–28.7 in). The plumage is mostly white, but the head and upper neck are featherless and black, with a featherless red stretchable patch at the base. The sexes are similar in appearance but the male is larger, which can be noticeable when the sexes are together. While it can give the impression of being an ungainly bird on the ground, the jabiru is a powerful and graceful flier.

Tassonomia

Hinrich Lichtenstein described the jabiru in 1819. The name jabiru has also been used for two other birds of a distinct genus: black-necked stork (Ephippiorhynchus asiaticus), commonly called "jabiru" in Australia; and sometimes also for the saddle-billed stork (Ephippiorhynchus senegalensis) of Sub-Saharan Africa. In particular, Gardiner's Egyptian hieroglyph G29, believed to depict an E. senegalensis, is sometimes labeled "jabiru" in hieroglyph lists. The Ephippiorhynchus is believed to be the jabiru's closest living cousin, indicating an Old World origin for the species.<p>The proposed Late Pleistocene fossil stork genus Prociconia from Brazil might actually belong in Jabiru. A fossil species of jabiru was found in the early Pliocene Codore Formation near Urumaco, Venezuela, and named Jabiru codorensis.<p>In Portuguese, the bird is called tuiuiu, tuim-de-papo-vermelho ("red-necked tuim", in Mato Grosso) and cauauá (in the Amazon Basin). The name jabiru is used for the wood stork (Mycteria americana).

Nome scientifico

Jabiru mycteria

Autorità

(Lichtenstein, MHC, 1819)

Ordine

Ciconiformi

Famiglia

Ciconidi

Genere

Jabiru

Areale e habitat

Migrazione

Resident species

Conservazione

Jabirus are widespread but not abundant in any area. They are considered a species of least concern by the IUCN, an improvement from a status of near threatened in 1988. Jabiru gained protected status in Belize in 1973. Since then, their numbers in that area have slowly risen. They have been granted protected status by the U.S. Migratory Bird Act.

Tendenza della popolazione

unknown