Editing Tree swallow (section)

==Taxonomy and etymology==
The tree swallow was described as ''Hirundo bicolor'' by [[Louis Pierre Vieillot]] in his ''Histoire naturelle des oiseaux de l'Amérique Septentrionale'', published in 1807.<ref name="Vieillot1807">{{cite book|title=Histoire naturelle des oiseaux de l'Amérique Septentrionale: contenant un grand nombre d'espèces décrites ou figurées pour la première fois|url=https://www.biodiversitylibrary.org/item/180307#page/155/mode/1up|year=1807|last=Vieillot|first=Louis Pierre|location=Paris|volume=1|language=fr|page=61|publisher=Crapelet}}</ref> It was then placed in its current genus ''[[Tachycineta]]'' when [[Jean Cabanis]] established it in 1850.<ref name="cabanis">{{cite book | last1 = Cabanis | first1 = Jean| author-link = Jean Cabanis | title = Museum Heineanum : Verzeichniss der ornithologischen Sammlung des Oberamtmann Ferdinand Heine auf Gut St. Burchard vor Halberstatdt | publisher = Independently commissioned by R. Frantz | volume = 1| year =1850 | location = Halberstadt | page =48 | language = de| url =https://www.biodiversitylibrary.org/item/196124#page/64/mode/1up }}</ref> In 1878, [[Elliott Coues]] suggested that the tree swallow, at the very least, be put in its own [[subgenus]], ''Iridoprocne'', on the basis of its plumage, along with the [[white-winged swallow]], [[Chilean swallow]], [[white-rumped swallow]], and [[mangrove swallow]].<ref name="Coues2">{{Cite book| publisher = Government Printing Office| last = Coues| first = Elliott| title = Birds of the Colorado Valley: a repository of scientific and popular information concerning North American ornithology| location = Washington, DC| date = 1878|url=https://www.biodiversitylibrary.org/item/32557#page/436/mode/1up}}</ref> By 1882, he had upgraded this to a full genus.<ref name="Coues1">{{Cite book| edition = 2| publisher = Estes and Lauriat| last = Coues| first = Elliott| title = A check list of North American birds| location = Boston| date = 1882|url=https://www.biodiversitylibrary.org/item/15998#page/48/mode/1up|page=42}}</ref> Some authors continued to use this classification, with the addition of [[Tumbes swallow]]; however, genetic evidence supports the existence of a single genus, ''Tachycineta''.<ref name="hbwleucorrhoa">{{cite journal|last1=Turner|first1=Angela|editor1-last=del Hoyo|editor1-first=Josep|editor2-last=Elliott|editor2-first=Andrew|editor3-last=Sargatal|editor3-first=Jordi|editor4-last=Christie|editor4-first=David A.|editor5-last=de Juana|editor5-first=Eduardo|year=2020|title=White-rumped Swallow (''Tachycineta leucorrhoa'')|journal=Handbook of the Birds of the World Alive|url=http://www.hbw.com/species/white-rumped-swallow-tachycineta-leucorrhoa|publisher=Lynx Edicions|doi=10.2173/bow.whrswa1.01|s2cid=216180193|access-date=14 January 2017|url-access=subscription }}</ref> The tree swallow is also called the white-bellied swallow for its white underparts.<ref name="Turner"/>

The generally accepted genus name is from [[Ancient Greek]] ''takhykinetos'', "moving quickly", and the specific ''bicolor'' is [[Latin]] and means "two-coloured".<ref name=job>{{cite book | last= Jobling | first= James A | year= 2010| title= The Helm Dictionary of Scientific Bird Names | url= https://archive.org/details/Helm_Dictionary_of_Scientific_Bird_Names_by_James_A._Jobling | publisher= Christopher Helm | location = London | isbn = 978-1-4081-2501-4 | pages = 72, 377}}</ref> The other genus name, ''Iridoprocne'', comes from the [[Greek language|Greek]] ''iris'', meaning rainbow, and [[Procne]], a figure who supposedly turned into a swallow.<ref name="Coues1"/>

How exactly the tree swallow is related to other members of ''Tachycineta'' is unresolved. In studies based on [[mitochondrial DNA]], it was placed [[basal (phylogenetics)|basal]] (meaning it was the first offshoot in the species tree) within the North American-Caribbean [[clade]] consisting of the [[violet-green swallow]], [[golden swallow]], and [[Bahama swallow]].<ref name="Cerasale2012">{{cite thesis|title=Energy balance in migratory birds: Insights from mitochondrial genomes and leptin receptor biology|year=2012|chapter=Phylogeny of the ''Tachycineta'' genus of New World swallows: Insights from complete mitochondrial genomes|type=PhD|publisher=Cornell University|last1=Cerasale|first1=David J.|last2=Dor|first2=Roi|last3=Winkler|first3=David W.|last4=Lovette|first4=Irby J.|pages=91–122|chapter-url=https://ecommons.cornell.edu/bitstream/handle/1813/30756/dc352.pdf?sequence=1#page=99}}</ref><ref name="WhittinghamSlikas2002">{{cite journal|last1=Whittingham|first1=Linda A|last2=Slikas|first2=Beth|last3=Winkler|first3=David W|last4=Sheldon|first4=Frederick H|title=Phylogeny of the tree swallow genus, ''Tachycineta'' (Aves: Hirundinidae), by Bayesian analysis of mitochondrial DNA sequences|journal=Molecular Phylogenetics and Evolution|volume=22|issue=3|year=2002|pages=430–441|issn=1055-7903|doi=10.1006/mpev.2001.1073|pmid=11884168|bibcode=2002MolPE..22..430W }}</ref> Although mitochondrial DNA is advocated as a better indicator of evolutionary changes because it evolves quickly, analyses based on it can suffer because it is only inherited from the mother, making it worse than [[nuclear DNA]] from multiple [[locus (genetics)|loci]] at representing the phylogeny of a whole group.<ref name="Moore1995">{{cite journal|last1=Moore|first1=William S.|title=Inferring phylogenies from mtDNA variation: Mitochondrial-gene trees versus nuclear-gene trees|journal=Evolution|volume=49|issue=4|year=1995|pages=718–726|issn=0014-3820|doi=10.2307/2410325|pmid=28565131|jstor=2410325}}</ref> A study based on such nuclear DNA placed the tree swallow in the most basal position within ''Tachycineta'' as a whole (as a [[sister group]] to the rest of the genus).<ref name="DorCarling2012">{{cite journal|last1=Dor|first1=Roi|last2=Carling|first2=Matthew D.|last3=Lovette|first3=Irby J.|last4=Sheldon|first4=Frederick H.|last5=Winkler|first5=David W.|title=Species trees for the tree swallows (Genus ''Tachycineta''): An alternative phylogenetic hypothesis to the mitochondrial gene tree|journal=Molecular Phylogenetics and Evolution|volume=65|issue=1|year=2012|pages=317–322|issn=1055-7903|doi=10.1016/j.ympev.2012.06.020|pmid=22750631|bibcode=2012MolPE..65..317D }}</ref>