Problems playing this file? See media help.
GREY GOOSE JACKET CODE
International Code of Zoological Nomenclature has suppressed Hanson's proposals, based on the criticisms of Banks and other ornithologists. The radical nature of this proposal has been controversial Richard Banks of the AOU urges caution before any of Hanson's proposals are accepted. Hanson, who had rediscovered wild populations of the Giant Canada Goose, proposed splitting Canada and cackling goose into six species and 200 subspecies. Thus, the species' distinctness is well evidenced. sandvicensis) originated from ancestral Canada geese. leucopsis) was determined to be a derivative of the cackling goose lineage, whereas the Hawaiian goose ( B. The holotype specimen of taverneri is a straightforward large pale cackling goose however, and hence the taxon is still valid today and was renamed "Taverner's cackling goose". The old "lesser Canada geese" were believed to be a partly hybrid population, with the birds named B. This has been aggravated by the overlap between the small types of Canada goose and larger types of cackling goose. The distinctions between the two geese have led to confusion and debate among ornithologists. The subspecies of the Canada goose were listed as: The AOU has divided the many subspecies between the two species. The British Ornithologists' Union followed suit in June 2005.
GREY GOOSE JACKET FULL
The cackling goose was originally considered to be the same species or several subspecies of the Canada goose, but in July 2004, the American Ornithologists' Union's Committee on Classification and Nomenclature split them into two species, making the cackling goose into a full species with the scientific name Branta hutchinsii. The Canada goose is also colloquially referred to as the "Canadian goose". According to the Oxford English Dictionary, the first citation for the 'Canada goose' dates back to 1772. It belongs to the Branta genus of geese, which contains species with largely black plumage, distinguishing them from the grey species of the genus Anser.īranta was a Latinised form of Old Norse Brandgás, "burnt (black) goose" and the specific epithet canadensis is a New Latin word meaning "from Canada". The Canada goose was one of the many species described by Carl Linnaeus in his 18th-century work Systema Naturae. The success of this common park species has led to its often being considered a pest species because of its excrement, its depredation of crops, its noise, its aggressive territorial behavior toward both humans and other animals, and its habit of stalking and begging for food, the latter a result of humans disobeying artificial feeding policies toward wild animals.Ĭanada geese grazing across the Ottawa River from Parliament Hill (2019) Like most geese, the Canada goose is primarily herbivorous and normally migratory it tends to be found on or close to fresh water.Įxtremely adept at living in human-altered areas, Canada geese have established breeding colonies in urban and cultivated habitats, which provide food and few natural predators. It has been introduced to the United Kingdom, Ireland, Finland, Sweden, Denmark, New Zealand, Japan, Chile, Argentina and the Falkland Islands. It is native to the arctic and temperate regions of North America, and it is occasionally found during migration across the Atlantic in northern Europe. The Canada goose ( Branta canadensis) is a large wild goose with a black head and neck, white cheeks, white under its chin, and a brown body.
0 kommentar(er)
