Yellow-bellied siskin

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Yellow-bellied siskin
Carduelis xanthogastra -Manizales, Caldas, Colombia-8.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Fringillidae
Subfamily: Carduelinae
Genus: Spinus
Species:
S. xanthogastrus
Binomial name
Spinus xanthogastrus
Spinus xanthogastrus map.svg
Synonyms

Carduelis xanthogastra
Sporagra xanthogastra

The yellow-bellied siskin (Spinus xanthogastrus) is a small passerine bird in the finch family Fringillidae. It breeds from Costa Rica south to southern Ecuador, central Bolivia and the highlands of northwestern Venezuela. According to phylogenetic studies Spinus notatus is its parental ancestor. [2] [3] [4]

Contents

Description

The yellow-bellied siskin is a small bird, 10.5 cm in length and weighing 12 g. The male is entirely black except for a bright yellow belly, tail sides and wing patches. The female is dark olive green above and has pale yellow underparts which become brighter on the belly. She has a blackish tail and wings and also has bright yellow primary wing patches and tail sides. Young birds resemble the female, but have dusky fringes to the upperpart feathers and smaller yellow wing and tail patches. The song of this bird is a pleasant chattering twitter, and the call is a sharp pyee.

The subspecies S. x. stejnegeri, which occurs from extreme southeastern Peru to central Bolivia, is larger and longer-billed than the nominate subspecies S. x. xanthogastrus. Males have larger yellow wing patches and more extensive black on the flanks. Females of this subspecies are darker olive above than the northern birds.

The yellow-bellied siskin is more of a woodland bird than the superficially similar lesser goldfinch (Spinus psaltria) and the latter species is paler and has a white wing patch and a more musical song.

Behaviour and ecology

The yellow-bellied siskin breeds in mountain oak forests at altitudes between 800–3,000 m. The nest is a shallow cup of rootlets, bark and lichens 2.4–3.7 m high in the dense foliage of a small tree in a clearing. The two or three green-tinged white eggs are laid in April or May and incubated by the female. Although not migratory, this species wanders within its range when not breeding.

The yellow-bellied siskin has been relentlessly persecuted for the cage-bird trade in some areas, such as central Costa Rica. Where it remains common, in remote or protected areas, flocks of up to 30 birds forage in the canopy for small insects and oak flowers, or descend to clearings for seeds. The males may sing socially.

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Spinus is a genus of passerine birds in the finch family. It contains the North and South American siskins and goldfinches, as well as two Old World species.

References

  1. BirdLife International (2020). "Spinus xanthogastrus". IUCN Red List of Threatened Species . 2020: e.T22720398A163566073. doi: 10.2305/IUCN.UK.2020-3.RLTS.T22720398A163566073.en . Retrieved 12 November 2021.
  2. Arnaiz-Villena; Areces; Rey; Enríquez-de-Salamanca; Ruiz-del-Valle (2012). "Three Different North American Siskin/Goldfinch Evolutionary Radiations (Genus Carduelis): Pine Siskin Green Morphs and European Siskins in America". Molecular Biology. 5: 73–81.
  3. Arnaiz-Villena; Gomez-Prieto; Ruiz-del-Valle (2009). "Chapter 10: Pylogeography of finches and Sparrows". Animal Genetics. Vol. 5. Nova Science Publishers. ISBN   978-1-60741-844-3.
  4. Zamora; Moscoso; Ruiz-del-Valle; Lowy; Serrano-Vela; Ira-Cachafeiro; Arnaiz-Villena (2006). "Conjoint mitochondrial phylogenetic trees for canaries Serinus spp. and goldfinches Carduelis spp. show several specific polytomies". Ardeola. 53: 1–17.

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