Glasses Wood Warbler

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Glasses Wood Warbler
Glasses warbler (subspecies Myioborus m. Ruficoronatus)

Glasses warbler (subspecies Myioborus m. Ruficoronatus )

Systematics
Order : Passerines (Passeriformes)
Subordination : Songbirds (passeri)
Superfamily : Passeroidea
Family : Wood Warbler (Parulidae)
Genre : Myioborus
Type : Glasses Wood Warbler
Scientific name
Myioborus melanocephalus
( Tschudi , 1844)

The Wood Warbler ( Myioborus melanocephalus ) is a small songbird from the genus Myioborus in the Wood Warbler family (Parulidae). The species forms a superspecies with the black-eared wood warbler ( Myioborus ornatus ) , which may also include the white-fronted wood warbler ( Myioborus albifrons ) and the Salvin wood warbler ( Myioborus flavivertex ). The distribution area of ​​the glasses wood warbler is in South America ( Colombia , Ecuador, Peru and Bolivia ). The IUCN lists it as “not at risk” (least concern).

features

Spectacle warblers reach a body length of 13.0 to 13.5 centimeters. The wing length is in the males 6.1 to 7.4 centimeters; in the females 6.3 to 7.0 centimeters. In the nominate form of the adult animals and young birds from the first year the crown and the reins are black and the ear covers are blackish; towards the back in the neck area it runs grayer. The striking yellow circles under the eyes, which are often connected to one another by a narrow yellow band above the forehead, make eye-catching glasses. The nape, the sides of the neck and the upper side plumage with a pale olive-tinted coat are dark gray. The wings are blackish with narrow gray feather edges. The underside plumage is yellow, the tail is blackish with outer white feathers and the under tail-coverts are white. The beak and legs are blackish.

Occurrence, nutrition and reproduction

The Eurasian Warbler are resident birds that change only to a limited extent within the altitude. They inhabit cloud forests, moist mountain forests and forest edges and the adjoining bushes at altitudes of 2000 to 3300 meters. They can often be seen near the tree line . During their forays, small family associations or groups usually form, which are often associated with other bird species. Their diet consists of insects and other invertebrates. They look for them in the higher layers of the trees, usually in the tree canopy, catch them like the flycatchers from a control room or look for them above the bushes. Sometimes they can be seen foraging for food at heights of 2 meters in the trees. When encountering the larval wood warbler ( Myioborus miniatus ), spectacle wood warbler often show aggressive behavior.

There are no studies on nest building. It may be similar to that of the closely related black-eared wood warbler. Also no exact breeding periods, breeding and nestling times are known. A clutch usually consists of two eggs. This finding goes back to the fact that several family associations were observed in the middle of February near Cuenca , Ecuador; the parent animals usually fed two young birds that had just fledged. There were further sightings of fledglings in March, April, June, July and September in northwest Ecuador as well as in February and March in the Amazon in Peru, in June and December in central Peru and in January in La Paz in Bolivia.

Subspecies and distribution

distribution

There are five recognized subspecies:

  • Myioborus m. melanocephalus ( Tschudi , 1844) - Widespread in central Peru.
  • Myioborus m. ruficoronatus ( Kaup , 1852) - Found in Ecuador and in the extreme southwest of Colombia. The subspecies differs from Myioborus m. griseonuchus due to the larger reddish-brown crown spot and the yellow sub-beard area .
  • Myioborus m. bolivianus Chapman , 1919 - Occurs in southern Peru and western-central Bolivia. Is slightly narrower than the nominate form and the yellow underside plumage is somewhat paler.
  • Myioborus m. griseonuchus Chapman, 1927 - Widespread in northwestern Peru. The subspecies has a narrower reddish-brown crown spot than Myioborus m. ruficoronatus .
  • Myioborus m. malaris Zimmer , 1949 - Occurs in northern Peru. Similar to the nominate form. The ear covers are more black and the lower beard area is also black.

swell

literature

  • Jon Curson, David Quinn, David Beadle: New World Warblers. Helm, London 1994, ISBN 0-7136-3932-6 , pp. 74 and 201.

Web links

Commons : Spectacled Wood Warbler ( Myioborus melanocephalus )  - Collection of images, videos and audio files