''Spinus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by t ...

birds in the

finch The true finches are small to medium-sized passerine birds in the family Fringillidae. Finches have stout conical bills adapted for eating seeds and nuts and often have colourful plumage. They occupy a great range of habitats where they are usua ...

family. It contains the North and South American siskins and goldfinches, as well as two Old World species. The genus name is from the

Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic peri ...

''spínos'', a name for a now-unidentifiable bird. All of the species in the genus, except for the

Tibetan serin The Tibetan serin (''Spinus thibetanus'') or Tibetan siskin is a true finch species (family Fringillidae). Taxonomy and systematics The Tibetan serin was formerly placed in the genus '' Serinus'' but was assigned to the genus '' Spinus'' based o ...

, were formerly included in the genus ''

Carduelis The genus ''Carduelis'' is a group of birds in the finch family Fringillidae. The genus ''Carduelis'' was introduced by the French zoologist Mathurin Jacques Brisson in 1760 by tautonomy based on Carl Linnaeus's specific epithet for the Europe ...

''. They were moved to the resurrected genus ''Spinus'' based on

phylogenetic In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups o ...

studies of mitochondrial and nuclear DNA sequences. The Tibetan serin was formerly placed in the genus ''

Serinus ''Serinus'' is a genus of small birds in the finch family Fringillidae found in Europe and Africa. The birds usually have some yellow in their plumage. The genus was introduced in 1816 by the German naturalist Carl Ludwig Koch. Its name is New L ...

''. The

Eurasian siskin The Eurasian siskin (''Spinus spinus'') is a small passerine bird in the finch family Fringillidae. It is also called the European siskin, common siskin or just siskin. Other (archaic) names include ''black-headed goldfinch'', ''barley bird'' a ...

and the Tibetan serin are the only species from the Old World included in the group. The genus ''Spinus'' was introduced in 1816 by the German naturalist

Carl Ludwig Koch Carl Ludwig Koch (21 September 1778 – 23 August 1857) was a German entomologist and arachnologist. He was responsible for classifying a great number of spiders, including the Brazilian whiteknee tarantula and common house spider. He was bo ...

with the

(''Spinus spinus'') as the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

Evolution and phylogeny

The

is an outgroup within ''Spinus'', having been the first to diverge. The remainder of the genus can be divided into three monophyletic clades: the North American goldfinches ( Lawrence's,

lesser Lesser, from Eliezer (, "Help/Court of my God"), is a surname. Notable people with the surname include: * Adolf Lesser (1851–1926), German physician * Aleksander Lesser (1814–1884), Polish painter and art critic * Anton Lesser (born 1952), Bri ...

, and

American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...

); the so-called North American siskins (

Eurasian Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern Hemisphere, Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Ja ...

pine A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accep ...

Antillean The Antilles (; gcf, label=Antillean Creole, Antiy; es, Antillas; french: Antilles; nl, Antillen; ht, Antiy; pap, Antias; Jamaican Patois: ''Antiliiz'') is an archipelago bordered by the Caribbean Sea to the south and west, the Gulf of Mex ...

, and black-capped); and the South American siskins (the remaining 12 species). The radiation of South American siskins was rapid, and was originally thought to have occurred around 3.5 million years ago due to a range expansion associated with the

Great American Interchange The Great American Biotic Interchange (commonly abbreviated as GABI), also known as the Great American Interchange and the Great American Faunal Interchange, was an important late Cenozoic paleozoogeographic biotic interchange event in which lan ...

and contingent upon the spread of mesothermal plants from the Rocky Mountains to the Andes. More recent work suggests the radiation occurred much later, within the last 1 million years, and speciation events may have been initiated by the climactic variations of the late

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...

. The

hooded siskin The hooded siskin (''Spinus magellanicus'') is a small passerine bird in the finch family (Fringillidae), native to South America. It belongs to the putative clade of neotropical siskins in the genus '' Spinus sensu lato''. There are 11 subspe ...

may be

paraphyletic In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be pa ...

Ecology

''Spinus'' finches are

gregarious Sociality is the degree to which individuals in an animal population tend to associate in social groups (gregariousness) and form cooperative societies. Sociality is a survival response to evolutionary pressures. For example, when a mother wasp ...

and may breed and forage in small groups. In the non-breeding season, these species generally disperse away from the breeding grounds and small flocks roam nomadically in search of food; these flocks may be of one species or mixed with other species in the genus. Some species, such as the

pine siskin The pine siskin (''Spinus pinus'') is a North American bird in the finch family. It is a migratory bird with an extremely sporadic winter range. Taxonomy The pine siskin was formally described in 1810 by the American ornithologist Alexander ...

and thick-billed siskin, are considered irruptive. Like most other members of

Carduelinae The cardueline finches are a subfamily, Carduelinae, one of three subfamilies of the finch family Fringillidae, the others being the Fringillinae and the Euphoniinae. The Hawaiian honeycreepers are now included in this subfamily. Except for the ...

, but unusually amongst

songbird A songbird is a bird belonging to the suborder Passeri of the perching birds (Passeriformes). Another name that is sometimes seen as the scientific or vernacular name is Oscines, from Latin ''oscen'', "songbird". The Passeriformes contains 5000 ...

s, members of ''Spinus'' are primarily

granivorous Seed predation, often referred to as granivory, is a type of plant-animal interaction in which granivores (seed predators) feed on the seeds of plants as a main or exclusive food source,Hulme, P.E. and Benkman, C.W. (2002) "Granivory", pp. 132 ...

, but may occasionally supplement their diet with insects or fruit. Most species eat a variety of small seeds, especially from

aster Aster or ASTER may refer to: Biology * ''Aster'' (genus), a genus of flowering plants ** List of ''Aster'' synonyms, other genera formerly included in ''Aster'' and still called asters in English * Aster (cell biology), a cellular structure shap ...

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...

es,

alder Alders are trees comprising the genus ''Alnus'' in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few sp ...

s, and

birch A birch is a thin-leaved deciduous hardwood tree of the genus ''Betula'' (), in the family Betulaceae, which also includes alders, hazels, and hornbeams. It is closely related to the beech-oak family Fagaceae. The genus ''Betula'' contains 30 ...

es.

Conservation

The

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

lists 17 species as

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

, two as vulnerable (

saffron siskin The saffron siskin (''Spinus siemiradzkii'') is a species of finch in the family Fringillidae. It is found in Ecuador and Peru. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical dry shrubland, and urban areas. ...

and

yellow-faced siskin The yellow-faced siskin (''Spinus yarrellii'') is a species of finch in the family Fringillidae. It is found in Brazil and Venezuela. Its natural habitats are subtropical or tropical moist mountains, subtropical or tropical dry shrubland, arable ...

), and one, the red siskin, as

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

. Species in this clade are threatened by

habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...

and capture for the

cage-bird trade Wildlife trade refers to the of products that are derived from non-domesticated animals or plants usually extracted from their natural environment or raised under controlled conditions. It can involve the trade of living or dead individuals, ti ...

Species

The genus contains 20 species:

References

{{DEFAULTSORT:Spinus (genus) Fringillidae Bird genera