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The '''northern cardinal''' ('''''Cardinalis cardinalis'''''), known colloquially as the '''common cardinal''', '''red cardinal''', or just '''cardinal''', is a bird in the genus ''[[Cardinalis]]''. It can be found in southeastern Canada, through the eastern United States from [[Maine]] to [[Minnesota]] to [[Texas]], [[New Mexico]], southern [[Arizona]], southern California, and south through [[Mexico]], [[Belize]], and [[Guatemala]]. It is also an introduced species in a few locations such as [[Bermuda]] and all major islands of [[Hawaii]] since its introduction in 1929. Its habitat includes woodlands, gardens, shrublands, and wetlands. It is the state bird of [[Illinois]], [[Indiana]], [[Kentucky]], [[North Carolina]], [[Ohio]], [[Virginia]], and [[West Virginia]].
 
The northern cardinal is a mid-sized [[Passerine|perching]] [[songbird]] with a body length of {{convert|21-23|cm|in|abbr=on}} and a crest on the top of the head. The species expresses [[sexual dimorphism]]: Females are a reddish olive color, and have a gray mask around the beak, while males are a vibrant red color, and have a black mask on the face, as well as a larger crest. Juvenile cardinals do not have the distinctive red-orange beak seen in adult birds until they are almost fully mature. On hatching, their beaks are grayish-black and they do not become the trademark orange-red color until they acquire their final adult plumage in the fall.<ref>{{Cite web |title=Juvenile Cardinals (Identification Guide with Pictures) |url=https://birdfact.com/articles/juvenile-cardinals |access-date=2023-09-05 |website=Birdfact |language=en}}</ref>
 
The northern cardinal is mainly [[Seed predation|granivorous]], but also feeds on insects and fruit. The male behaves [[Territory (animal)|territorially]], marking out his territory with song. During courtship, the male feeds seed to the female beak-to-beak. The northern cardinal's clutch typically contains three to four eggs, with two to four clutches produced each year. It was once prized as a pet, but its sale was banned in the United States by the [[Migratory Bird Treaty Act of 1918]].
 
==Taxonomy==
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| year =1921
| pages =[https://archive.org/details/bub_gb_6w0LAAAAIAAJ/page/n604 500]
| url = https://archive.org/details/bub_gb_6w0LAAAAIAAJ}}</ref> In 1983, the scientific name was changed again to ''Cardinalis cardinalis'' and the common name was changed to "northern cardinal", to avoid confusion with the several other species also termed cardinals.<ref name="Ritchison" />
 
The cardinal is named after [[Cardinal (Catholicism)|cardinals]] of the [[Roman Catholic Church]], who wear distinctive red robes and caps.<ref name="Holloway">{{cite book|last= Holloway|first= Joel Ellis|title= Dictionary of Birds of the United States: Scientific and Common Names|publisher= [[Workman Publishing Company|Timber Press]]|year= 2003|pages= 59|url= https://books.google.com/books?id=41knpiVqnKYC&q=Cathartes+aura+subject:%22Nature+/+Birds+%26+Birdwatching%22&pg=PA59|isbn= 0-88192-600-0}}</ref><ref>{{cite news|url= http://bangordailynews.com/2012/09/21/outdoors/proliferation-of-cardinals-a-fairly-recent-event/?ref=mostReadBoxLiving|title= Proliferation of cardinals a fairly recent event|first= Bob|last= Duchesne|date= 2012-09-21|newspaper= [[Bangor Daily News]]|archive-url= https://web.archive.org/web/20141006093138/http://bangordailynews.com/2012/09/21/outdoors/proliferation-of-cardinals-a-fairly-recent-event/?ref=mostReadBoxLiving|archive-date= 2014-10-06|url-status= live}}</ref> The term "northern" in the common name refers to its range, as it is the northernmost cardinal species known.<ref name="Holloway" />
 
== Distribution and habitat ==
Northern cardinals are numerous across the eastern United States from the southern half of [[Maine]] to [[Minnesota]] to the [[Texas]]-Mexico border and in Canada in the southern portions of [[Ontario]], Quebec, [[New Brunswick]] and [[Nova Scotia]], all the way east to Cape Breton Island. Its range also extends south through Mexico to the [[Isthmus of Tehuantepec]], northern [[Guatemala]], and northern [[Belize]]. An [[allopatric]] population is found on the Pacific slope of Mexico from [[Jalisco]] to [[Oaxaca]] ''(this population is not shown on the range map)''. The species was introduced to [[Bermuda]] in 1700. It has also been introduced in Hawaii, southern California, and southern [[Arizona]]. Its natural [[habitat (ecology)|habitat]] is in woodlands, gardens, shrublands, and wetlands.<ref name="iucn status 12 November 2021" />
 
In 1929, Forbush described the species as rare, and by 1955 Griscom reported the bird to be "pushing northward" when recorded annually at feeding stations. Audubon data shows that the population has grown rapidly in Massachusetts since 1960. In Massachusetts, the species is most abundant in the east, especially in areas where dense cover is interspersed with open areas, such as woodland edges, brushy fields, wooded wetlands, parks, and suburban areas. They tend to avoid extensive woodlands.<ref name=":1" />
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=== Defecation ===
Nestlings defecate in the form of a fecal sac, where the fecal matter is enclosed by a tough mucusmucous membrane. They are produced every 3 or 4 feedings, and female cardinals sometimes stimulate defecation by poking the nestling near the cloaca. Fecal sacs from the first 4- or 5 days of nesting are eaten by the parents, and later sacs are carried away from the nest and dropped.<ref name="Ritchison" />
 
== Ecology ==