Rallo fasciato

Identificazione

It is a largely terrestrial bird the size of a small domestic chicken, with mainly brown upperparts, finely banded black and white underparts, a white eyebrow, chestnut band running from the bill round the nape, with a buff band on the breast. It utilises a range of moist or wetland habitats with low, dense vegetation for cover. It is usually quite shy but may become very tame and bold in some circumstances, such as in island resorts within the Great Barrier Reef region.

Tassonomia

In 1760 the French zoologist Mathurin Jacques Brisson described and illustrated the buff-banded rail in his multi-volume Ornithologie based on a specimen collected in the Philippines. He used the French name Le rasle rayé des Philippines and the Latin name Rallus Philippensis Striatus. Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition he added 240 species that had been previously described by Brisson in his Ornithologie. One of these was the buff-banded rail. Linnaeus included a terse description, coined the binomial name Rallus philippensis and cited Brisson's work. The buff-banded rail was formerly placed in the genus Gallirallus but is now placed in the genus Hypotaenidia that was introduced in 1853 by the German naturalist Ludwig Reichenbach.<p>Numerous subspecies are recognised for the buff-banded rail because of repeated dispersion of birds to islands in the Pacific, often followed by founder effects and reduced potential for gene flow. The weka in New Zealand evolved from a lineage with common ancestry to modern buff-tailed banded rail populations, and has changed over time to become flightless.<p>Twenty subspecies are recognised:

Nome scientifico

Gallirallus philippensis

Autorità

(Linnaeus, 1766)

Ordine

Gruiformi

Famiglia

Rallidae

Genere

Gallirallus

Areale e habitat

Migrazione

Complete migrants

Comportamento

The buff-banded rail is an omnivorous scavenger which feeds on a range of terrestrial invertebrates and small vertebrates, seeds, fallen fruit and other vegetable matter, as well as carrion and refuse. Its nest is usually situated in dense grassy or reedy vegetation close to water, with a clutch size of 3–4. Although some island populations may be threatened, or even exterminated, by introduced predators, the species as a whole appears to be safe and its conservation status is considered to be of Least Concern.

Conservazione

Tendenza della popolazione

stable