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Overview

Distribution

occurs (regularly, as a native taxon) in multiple nations

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Global Range: Resident from southwestern Washington, western Oregon, northeastern California, northern Nevada, northern Utah, northern Colorado, south to northwestern Oklahoma, north-central and central Texas, south through Mexico to northern South America (northern Venezuela, western Colombia, locally in western Ecuador and northwestern Peru; Ridgely and Tudor 1989). Introduced and established on Cuba, at least formerly). Mainly migratory in Rocky Mountains region.

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Physical Description

Size

Length: 11 cm

Weight: 10 grams

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Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
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Comments: Partly open situations with scattered trees, woodland edge, second growth, open fields, pastures, and around human habitation (upper Tropical to lower Temperate zones) (AOU 1983). Found in areas where water available. Nest is built by female in tree or shrub, usually 0.6-9 m above ground, in dense foliage, often near water; beside road or in brushy field in Costa Rica (Stiles and Skutch 1989).

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Migration

Non-Migrant: Yes. At least some populations of this species do not make significant seasonal migrations. Juvenile dispersal is not considered a migration.

Locally Migrant: Yes. At least some populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.

Migratory in Rocky Mountains region.

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Trophic Strategy

Comments: Thistle and other seeds comprise about 96% of its diet. A few insects may be taken during the breeding season. Usually forages on or near the ground. Often forages in flocks. Flowers included in diet in Costa Rica (Stiles and Skutch 1989).

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General Ecology

May form loose winter flocks of 20-30 birds that may also include other species of goldfinches and passerines.

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Life History and Behavior

Life Expectancy

Lifespan, longevity, and ageing

Maximum longevity: 5.7 years (wild)
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Reproduction

Clutch size is 3-6 in north (usually 4-5); 3-4 in Costa Rica. Incubation, by female, lasts 12 days. Altricial young are tended by both parents. Breeding pairs may stay together all winter.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Carduelis psaltria

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 2 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

CCTATACCTAATTTTCGGCGCATGAGCCGGNATAGTAGGCACTGCCCTAAGCCTTCTCATCCGAGCAGAATTAGGTCAACCCGGGGCCCTCCTAGGAGACGACCAAGTCTACAACGTAATCGTCACGGCCCATGCTTTCGTCATAATCTTCTTCATAGTTATACCCATCATAATCGGAGGATTCGGAAACTGACTAGTTCCCCTAATAATCGGAGCCCCAGACATAGCATTCCCACGAATAAATAACATAAGCTTCTGACTACTTCCCCCATCATTCCTCCTCCTTCTAGCATCCTCCACCGTAGAAGCAGGTGTCGGTACAGGCTGAACAGTATACCCTCCACTAGCTGGTAACCTAGCCCATGCCGGAGCTTCAGTTGACTTAGCAATCTTCTCCCTACACTTAGCCGGTATCTCTTCAATCCTAGGCGCAATCAACTTCATCACAACAGCAATCAACATAAAACCTCCCGCCCTATCACAATACCAAACCCCCCTATTCGTTTGATCAGTCCTAATTACTGCAGTACTCCTACTCCTCTCCCTCCCAGTTCTTGCTGCAGGAATTACAATACTTCTCACAGACCGCAACCTCAACACCACATTCTTCGACCCTGCAGGAGGAGGCGACCCAGTCCTATACCAACACCTCTTCTGATCNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
-- end --

Download FASTA File

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Statistics of barcoding coverage: Carduelis psaltria

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
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National NatureServe Conservation Status

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Population

Population Trend
Decreasing
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Threats

Comments: Costa Rica: capture for cage-bird trade has greatly reduced numbers in many areas (Stiles and Skutch 1989).

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Relevance to Humans and Ecosystems

Benefits

Economic Uses

Comments: Captured for cage-bird trade in Central America (Stiles and Skutch 1989).

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Wikipedia

Lesser goldfinch

The lesser goldfinch or dark-backed goldfinch (Spinus psaltria) is a very small songbird of the Americas. Together with its relatives the American goldfinch and Lawrence's goldfinch, it forms the American goldfinches clade in the genus Spinus sensu stricto.

The American goldfinches can be distinguished by the males having a black (rarely green) forehead, whereas the latter is (like the rest of the face) red or yellow in the European goldfinch and its relatives. North American males are markedly polymorphic and 5 subspecies are often named; at least 2 of them seem to represent a less-progressed stage in evolution however.

Description[edit]

This petite species is not only the smallest North American Spinus finch, it may be the smallest true finch in the world.[2][3] Some sources list more subtropical Spinus species as slightly smaller on average, including the Andean siskin.[4] This species ranges from 9 to 12 cm (3.5 to 4.7 in) in length and can weigh from 8 to 11.5 g (0.28 to 0.41 oz).[4][5][6] Among standard measurements, the wing chord is 5.5 to 7 cm (2.2 to 2.8 in), the tail is 3.9 to 4.7 cm (1.5 to 1.9 in), the bill is 0.9 to 1.1 cm (0.35 to 0.43 in) and the tarsus is 1.1 to 1.2 cm (0.43 to 0.47 in).[4] There is a slight NW-SE cline in size, with the largest birds from Mexico and south being up to one-fifth larger than the smallest from the extreme NW of its range; this effect is more pronounced in females. There is also considerable variation in the amount of black on head and back in males, and thus three subspecies have been proposed. But this variation too seem to be simple and clinal changes in allele frequency, and thus the "subspecies" might be better considered morphs or geographical forms.[7]

"Arkansas goldfinch" male from Borrego Springs (California, 116°22′19″W).
Ear region is usually dark in typical psaltria.

Males are easily recognized by their bright yellow underparts and big white patches in the tail (outer rectrices) and on the wings (the base of the primaries). They range from having solid black from the back to the upper head including the ear-coverts to having these regions medium green; each of the back, crown and ear regions varies in darkness rather independently though as a rule the ears are not darker than the rest. In most of the range dark psaltria birds (Arkansas goldfinch) predominate. The light birds are termed hesperophilus and are most common in the far western U.S. and northwestern Mexico.[7]

The zone in which both light and dark males occur on a regular basis is broadest in the north, and extends across the width of the Rocky Mountains and Sierra Madre Occidental ranges. It reaches the Pacific coast in southern Sonora to northern Sinaloa, roughly between area of Ciudad Obregón to Culiacán. In the United States, the most diverse array of phenotypes can be found in Colorado and New Mexico. East of the 106th meridian west in southwestern Texas as well as in most of Mexico, almost all males have black backs. Spinus psaltria colombianus, east and south of the Isthmus of Tehuantepec, is richer yellow below in males. This as well as the even yellower S. p. jouyi from the Yucatán Peninsula and adjacent regions and S. p. witti from the Islas Marías off Nayarit[8] require more study, especially as at least the former two seem also to be significantly larger and longer-billed.[7]

Female

Females' and immatures' upperparts are more or less grayish olive-green; their underparts are yellowish, buffier in immatures. They have only a narrow strip of white on the wings (with other white markings in some forms) and little or no white on the tail. They are best distinguished from other members of the genus by the combination of small size, upperparts without white or yellow, and dark gray bill. In all plumages this bird can easily be taken for a New World warbler if the typical finch bill isn't seen well.

Like other goldfinches, it has an undulating flight in which it frequently gives a call: in this case, a harsh chig chig chig.[9] Another distinctive call is a very high-pitched, drawn-out whistle, often rising from one level pitch to another (teeeyeee) or falling (teeeyooo). The song is a prolonged warble or twitter, more phrased that that of the American goldfinch,[10] often incorporating imitations of other species.

Distribution and ecology[edit]

Lesser Goldfinch Landing, Santa Fe.jpg

This American goldfinch ranges from the southwestern United States (near the coast, as far north as extreme southwestern Washington) to Venezuela and Peru. It migrates from the colder parts of its U.S. range.

The lesser goldfinch often occurs in flocks or at least loose associations. It utilizes almost any habitat with trees or shrubs except for dense forest, and is common and conspicuous in many areas, often coming near houses. It is common at feeders in the Southwest United States and will come almost anywhere with thistle sock feeders. Flocks of at least six birds will often be seen at feeders. It feeds mostly on tree buds and weed seeds; geophagy has been observed in this species.[11]

The nesting season is in summer in the temperate parts of its range; in the tropics it apparently breeds all-year round, perhaps less often in September/October.[12] It lays three or four bluish white eggs in a cup nest made of fine plant materials such as lichens, rootlets, and strips of bark, placed in a bush or at low or middle levels in a tree.

The moult occurs in two different patterns which coincides with the blackness of the upperparts quite well. Here too is a broad zone of intergradation. Pacific birds moult after breeding, and females shed a few body feathers before breeding too. Juvenile males shed more remiges than females when moulting into adult plumage. East of the 106th meridian west, birds moult strongly before breeding and replace another quantity of feathers afterwards, and post-juvenal moult does not differ significantly between the sexes. However, this seems dependent on the differing rainfall regimes; simply put, birds at least anywhere in the North American range moult most of their plumage at the end of the dry season and may replace more feathers at the end of the wet season.[7]

Considered a Species of Least Concern by the IUCN due to its vast range, it nonetheless seems to be declining locally. For example, it is rare in the Ecuadorean Andes foothills.[12]

Phylogeny and Evolution[edit]

Molecular genetics and phylogeny together with other Carduelis/Spinus species relatedness has been established by Antonio Arnaiz-Villena et al. Also, its appearance on Earth was calculated approximately [1][2]

This siskin is the North American species which has expanded more widely. It reaches from EEUU to North Peru through Andean spine [3]

Footnotes[edit]

  1. ^ BirdLife International (2012). "Carduelis psaltria". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013. 
  2. ^ Peterson et al. (1990), Sibley (2000)
  3. ^ Hilty, Steven L., Birds of Venezuela, 2002, Princeton University Press
  4. ^ a b c Finches and Sparrows by Peter Clement. Princeton University Press (1999). ISBN 978-0691048789.
  5. ^ Birds of the World blog
  6. ^ CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.
  7. ^ a b c d Willoughby (2007)
  8. ^ Quatro (2007)
  9. ^ Sibley (2000)
  10. ^ Peterson et al. (1990)
  11. ^ Delgado-V. (2006)
  12. ^ a b Cisneros-Heredia (2006)

References[edit]

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Names and Taxonomy

Taxonomy

Comments: Formerly (AOU 1983, 1998) listed in Carduelis. Acanthis and Spinus were considered separate genera prior to their merger into Carduelis (AOU 1983), in part following Mayr and Short (1970), although they continued to be listed as subgenera. Recent mitochondrial genetic data (Arnaiz-Villena et al. 2008) indicate that Carduelis is polyphyletic and that Acanthis spp., Spinus spp., Carduelis carduelis, and Chloris sinica belong to different clades.

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