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Screamer
The screamers are three South American bird species placed in Family (biology), family Anhimidae. They were thought to be related to the Galliformes because of similar beak, bills, but are more closely related to ducks (family Anatidae),Todd, F. (1991) and most closely related to the magpie goose. The clade is exceptional within the living birds in lacking uncinate processes of ribs. The three species are: The horned screamer (''Anhima cornuta''); the southern screamer or crested screamer (''Chauna torquata''); and the northern screamer or black-necked screamer (''Chauna chavaria''). Systematics and evolution Screamers have a poor fossil record. A putative Eocene specimen is known from Wyoming, while the more modern ''Chaunoides antiquus'' is known from the late Oligocene to early Miocene in Brazil. Anhimids are most similar to Presbyornithidae, presbyornithids, with which they form a clade to the exclusion of the rest of Anseriformes. Given the presence of lamelae in the otherw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horned Screamer
The horned screamer (''Anhima cornuta'') is a member of a small family of birds, the Anhimidae, which occurs in wetlands of tropical South America. There are three screamer species, the other two being the southern screamer and the northern screamer in the genus ''Chauna''. They are related to the ducks, geese and swans, which are in the family Anatidae, but have bills looking more like those of game birds. Taxonomy Already known in the 17th century, the horned screamer was described in 1766 by the Swedish naturalist Carl Linnaeus in the twelfth edition of his ''Systema Naturae''. He introduced the binomial name ''Palamedea cornuta''. The horned screamer is now the only species placed in the genus ''Anhima'' that was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The specific epithet ''cornuta'' is the Latin word for "horned". The German naturalist Georg Marcgrave had used the Latin name ''Anhima'' in 1648 for the horned screamer in his ''Historia natura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anhima
The horned screamer (''Anhima cornuta'') is a member of a small family of birds, the Anhimidae, which occurs in wetlands of tropical South America. There are three screamer species, the other two being the southern screamer and the northern screamer in the genus ''Chauna''. They are related to the ducks, geese and swans, which are in the family Anatidae, but have bills looking more like those of game birds. Taxonomy Already known in the 17th century, the horned screamer was described in 1766 by the Swedish naturalist Carl Linnaeus in the twelfth edition of his '' Systema Naturae''. He introduced the binomial name ''Palamedea cornuta''. The horned screamer is now the only species placed in the genus ''Anhima'' that was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The specific epithet ''cornuta'' is the Latin word for "horned". The German naturalist Georg Marcgrave had used the Latin name ''Anhima'' in 1648 for the horned screamer in his ''Historia na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anhima Cornuta - Horned Screamer
The horned screamer (''Anhima cornuta'') is a member of a small family of birds, the Anhimidae, which occurs in wetlands of tropical South America. There are three screamer species, the other two being the southern screamer and the northern screamer in the genus ''Chauna''. They are related to the ducks, geese and swans, which are in the family Anatidae, but have bills looking more like those of game birds. Taxonomy Already known in the 17th century, the horned screamer was described in 1766 by the Swedish naturalist Carl Linnaeus in the twelfth edition of his ''Systema Naturae''. He introduced the binomial name ''Palamedea cornuta''. The horned screamer is now the only species placed in the genus ''Anhima'' that was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The specific epithet ''cornuta'' is the Latin word for "horned". The German naturalist Georg Marcgrave had used the Latin name ''Anhima'' in 1648 for the horned screamer in his ''Historia natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Screamer
The southern screamer (''Chauna torquata'') is a species of bird in family Anhimidae of the waterfowl order Anseriformes. It is found in Argentina, Bolivia, Brazil, Paraguay, Peru, and Uruguay.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022 Taxonomy and systematics The southern screamer shares genus ''Chauna'' with the northern screamer (''C. chavaria''). One other species, the horned screamer (''Anhima cornuta'') is also in family Anhimidae. The southern screamer is monotypic. Description The southern screamer is one of the largest birds of southern South America at long and weighing about . Their flat wing measures , their tail , and their culmen . They are stout bodied with a disproportionately small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Screamer
The southern screamer (''Chauna torquata'') is a species of bird in family Anhimidae of the waterfowl order Anseriformes. It is found in Argentina, Bolivia, Brazil, Paraguay, Peru, and Uruguay.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022 Taxonomy and systematics The southern screamer shares genus ''Chauna'' with the northern screamer (''C. chavaria''). One other species, the horned screamer (''Anhima cornuta'') is also in family Anhimidae. The southern screamer is monotypic. Description The southern screamer is one of the largest birds of southern South America at long and weighing about . Their flat wing measures , their tail , and their culmen . They are stout bodied with a disproportionately small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Screamer
The northern screamer (''Chauna chavaria'') is a Near Threatened species of bird in family Anhimidae of the waterfowl order Anseriformes. It is found in Colombia and Venezuela. Taxonomy and systematics The northern screamer shares genus ''Chauna'' with the southern screamer (''C. torquata''). One other species, the horned screamer (''Anhima cornuta'') is also in family Anhimidae. The northern screamer is monotypic. Description The northern screamer is long. They are stout bodied with a disproportionately small head and a gray bill. The sexes have the same plumage. Adults have a gray crown with a long crest, a mostly white face, a wide black band around the neck, and a dark gray body, wings, and tail. Their wing has two sharp spurs at its manus. They have bare red skin around their brown eye and reddish orange legs and feet. Juveniles are similar to adults but drabber.Carboneras, C., P. F. D. Boesman, G. M. Kirwan, and C. J. Sharpe (2020). Northern Screamer (''Chauna chavar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Screamer
The northern screamer (''Chauna chavaria'') is a Near Threatened species of bird in family Anhimidae of the waterfowl order Anseriformes. It is found in Colombia and Venezuela. Taxonomy and systematics The northern screamer shares genus ''Chauna'' with the southern screamer (''C. torquata''). One other species, the horned screamer (''Anhima cornuta'') is also in family Anhimidae. The northern screamer is monotypic. Description The northern screamer is long. They are stout bodied with a disproportionately small head and a gray bill. The sexes have the same plumage. Adults have a gray crown with a long crest, a mostly white face, a wide black band around the neck, and a dark gray body, wings, and tail. Their wing has two sharp spurs at its manus. They have bare red skin around their brown eye and reddish orange legs and feet. Juveniles are similar to adults but drabber.Carboneras, C., P. F. D. Boesman, G. M. Kirwan, and C. J. Sharpe (2020). Northern Screamer (''Chauna chavar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaunoides Antiquus
Chaunoides is an extinct genus of screamer The screamers are three South American bird species placed in Family (biology), family Anhimidae. They were thought to be related to the Galliformes because of similar beak, bills, but are more closely related to ducks (family Anatidae),Todd, F. .... Only one species of this genus is known, namely ''Chaunoides antiquus''. References Anhimidae Miocene birds Prehistoric bird genera Fossil taxa described in 1999 {{anseriformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spur (zoology)
A spur is an outgrowth of bone covered in a sheath of horn found in various anatomical locations in some animals. Unlike claws or nails, which grow from the tip of the toes, spurs form from other parts of the foot, usually in connection with joints where the toes meet the foot or the foot meets the long bones. Spurs are most commonly found on the hindfeet, though some birds possess spurs at the leading edge of the wings. Anatomy A spur is much like a true horn; it is a bony core attached to the skeleton and has an outer horny layer. Like horns, the spur grows from the base outwards, so the tip is older than the base. Some spurs form as an outgrowth of an existing bone, though most are secondarily formed as dermal bone hinged to the skeleton through a semi-rigid joint. Spurs on the hind-feet do not appear to molt, but the wing spurs of birds are molted once a year along with the wing feathers. Unlike claws, spurs are normally straight or only slightly curved, making them suited ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chauna
''Chauna'' is a genus of birds in the screamer family. Its two members are found in wetlands of South America. Description They are large, bulky birds, with a small downy head, long legs and large feet which are only partially webbed. They have large spurs on their wings which are used in fights over mates and territorial disputes. Conservation The southern screamer is overall fairly common and sometimes considered a pest as it raids crops and competes with farm birds for food. In contrast, the northern screamer is relatively rare and therefore considered near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo .... Species References * {{Taxonbar, from=Q2662452 Anhimidae Bird genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaunoides
Chaunoides is an extinct genus of screamer The screamers are three South American bird species placed in Family (biology), family Anhimidae. They were thought to be related to the Galliformes because of similar beak, bills, but are more closely related to ducks (family Anatidae),Todd, F. .... Only one species of this genus is known, namely ''Chaunoides antiquus''. References Anhimidae Miocene birds Prehistoric bird genera Fossil taxa described in 1999 {{anseriformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beak
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food, courtship, and feeding young. The terms ''beak'' and ''rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a beak-like structure), sirens, pufferfish, billfishes and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections – the upper and lower mandibles – are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the word "beak" was, in the past, generally restricted to the sharpened bills o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
