Stripe belly tachurity runner

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Stripe belly tachurity runner
Anairetes reguloides 1847.jpg

Stripe- belly Tachurityrann ( Anairetes reguloides )

Systematics
Subordination : Screeching Birds (Tyranni)
Family : Tyrants (Tyrannidae)
Subfamily : Elaeniinae
Tribe : Elaeniini
Genre : Anairetes
Type : Stripe belly tachurity runner
Scientific name
Anairetes reguloides
( d'Orbigny & Lafresnaye , 1837)

The striped tachuri ( Anairetes reguloides ) or sometimes the striped tachuri is a species of bird from the family of the tachurean (Anairetes). This species has a large distribution area, which is limited to the countries of Peru and Chile . The IUCN assesses the population as Least Concern .

features

The stripe-belly Tachurityrann reaches a body length of about 11.5 centimeters. The mandible and base of the mandible of the male are pale, while the rest of the mandible is flesh-red. The top is black with distinctive white stripes. The black comb is outlined in white. The nape of the neck and the clear central crown hem are colored white. The wings have two white cross bars and patterns. The tail has white spots, which are thickest at 4 to 5 millimeters on the inner plumes of the outer control spring and become smaller and smaller towards the inside. The outer flags of the outer control feathers are white. The black part of the head, the reins and the side of the head part is streaked with indistinct white stripes at the throat. The rest of the underside shows light lead-yellow colorations and is also traversed by black stripes on the sides and chest. The stripes are missing from the abdominal area.

The female is similar to the male but has a significantly shorter crest. The black and white of the back and wings is replaced by a dark shade of light yellow brown. The parting and the sides of the head are streaked with indistinct white lines. There is a white half-ring under the eye. The plumage on the underside is similar in color to that of the male.

In young birds , the back area is dark brown with tan stripes. The yellow-brown of the reins in front of the eye changes to stripes towards the back, but is then yellow-brown again in the lower area of ​​the head and the semicircle under the eye. The underside looks a bit lighter with a dark chest band and stripes on the side, but these are not necessarily noticeable in the field.

distribution and habitat

You move in the bank thicket , Polylepis scrub and mixed shrubs of typical Loma vegetation at heights from sea level to 2900 meters. However, they have been observed at Quebrada Matará in the Cordillera Blanca at an altitude of 4200 meters.

behavior

The behavior of the bird is similar to that of the black- hooded tachyrinths ( Anairetes nigrocristatus ). Occasionally they follow mixed flocks of birds and they can then be spotted together with yellow-billed tachurean ranches ( Anairetes flavirostris ), for example . The chant is a long trembling trrrrr . Often they give off a loud, diminishing series of whistles.

Subspecies

Two subspecies are described, which differ mainly in their coloration and their area of ​​distribution:

  • Anairetes reguloides reguloides (d'Orbigny & Lafresnaye, 1837) The nominate form is present from the Ancash region via Ica to the west of Apurímac . However, there is only one report from Apurímac.
  • Anairetes reguloides albiventris ( Chapman , 1924) This subspecies is similar to the nominate form but has little or no yellow in the plumage. The entire abdominal area is white or almost white instead of light lead yellow. The hem of the feathers on the top lacks the yellow tint. The tail is slightly longer than in the nominate form. This subspecies occurs in southwestern Peru from the south of the Ayacuchos region to the south of Tacna and the extreme northwest of Chile in the Región de Arica y Parinacota .

literature

  • Jon Fjeldså , Niels Krabbe : Birds of the High Andes: A Manual to the Birds of the Temperate Zone of the Andes and Patagonia, South America , Zoological Museum and Apollo Books, pp. 471 f, ISBN 978-8788757163
  • Thomas Schulenberg , Douglas F. Stotz , Daniel F. Lane: Birds of Peru. Princeton University Press, 2007, ISBN 978-0691049151 , p. 420.
  • Frank Michler Chapman: Descriptions of new flycatchers from Colombia, Ecuador, and Peru , American Museum novitates, No 118, 1924, p. 7

Web links

Individual evidence

  1. ↑ American Museum novitates Descriptions of new flycatchers from Colombia, Ecuador, and Peru Spizitornis reguloides albiventris (PDF; 1.1 MB) Original article on the subspecies