Information about Screamer
| Screamers | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
) Black-necked Screamer, Chauna chavaria Black-necked Screamer, Chauna chavaria | ||||||||||
| Scientific classification | ||||||||||
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| Genera | ||||||||||
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The three species occur only in South America, ranging from Venezuela to northern Argentina. 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, these can break off in the breast of other screamers, and are regularly renewed. Unlike ducks they have a partial moult, and are able to fly throughout the year. They live in open areas and marshes with some grass and feed on water plants. One species, the Southern Screamer, is considered a pest as it raids crops and competes with farm birds.
They lay up to between 2 to 7 white eggs, with four or five being the usual number. The young, like those of most Anseriformes, can run as soon as they are hatched. The chicks are usually raised in or near water as they can swim better than they can run, and therefore avoid predators. Like the ducks, screamer chicks imprint early in life, and this, coupled with their unfussy diet makes them amenable to domestication. They make excellent watchdogs with their loud screams at anything new and potentially threatening.
It is uncertain whether the three screamer species are endangered or declining. They are seldom hunted, in spite of their conspicuous nature, because their flesh has a spongy texture and is riddled with air-sacs, and is considered highly unpalatable. The main threats are habitat destruction and increased intensification of agriculture, but the extent of this is unknown.
Species
- Horned Screamer, Anhima cornuta
- Crested Screamer or Southern Screamer, Chauna torquata
- Black-necked Screamer or Northern Screamer, Chauna chavaria
Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Aves
Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Anseriformes
Wagler, 1831
Families
The order Anseriformes
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Wagler, 1831
Families
- Anhimidae
- Anseranatidae
- Anatidae
- †Dromornithidae
- †Presbyornithidae
- †Gastornidae(?)
The order Anseriformes
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Leonhard Hess Stejneger (October 30, 1851 - February 28, 1943) was a zoologist.
Stejneger was born in Bergen, Norway, and studied law and philosophy at the University of Christiania. He earned a Ph.D. and started a brief career as a lawyer.
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Stejneger was born in Bergen, Norway, and studied law and philosophy at the University of Christiania. He earned a Ph.D. and started a brief career as a lawyer.
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Chauna
Illiger, 1811
species
C. torquata
C. chavaria
Chauna is a genus of birds in the screamer family. Its two members breed in South America.
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Illiger, 1811
species
C. torquata
C. chavaria
Chauna is a genus of birds in the screamer family. Its two members breed in South America.
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Aves
Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Galliformes
Temminck, 1820
Families
Megapodiidae
Numididae
Odontophoridae
Phasianidae
Meleagrididae
Tetraonidae
Cracidae
(?)Mesitornithidae
Galliformes
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Temminck, 1820
Families
Megapodiidae
Numididae
Odontophoridae
Phasianidae
Meleagrididae
Tetraonidae
Cracidae
(?)Mesitornithidae
Galliformes
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Duck is the common name for a number of species in the Anatidae family of birds. The ducks are divided between several subfamilies listed in full in the Anatidae article. Ducks are mostly aquatic birds, mostly smaller than their relatives the swans and geese, and may be found in
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Anseranatidae
Sclater, 1880
Genus: Anseranas
Lesson, 1828
Species: A.
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Sclater, 1880
Genus: Anseranas
Lesson, 1828
Species: A.
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The beak, bill or rostrum is an external anatomical structure of birds which, in addition to eating, is used for grooming, manipulating objects, killing prey, probing for food, courtship, and feeding their young.
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South America is a continent of the Americas, situated entirely in the Western Hemisphere and mostly in the Southern Hemisphere. It is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie
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Motto
[2]
Anthem
Gloria al Bravo Pueblo (Spanish)
"Glory to the Brave People"
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[2]
Anthem
Gloria al Bravo Pueblo (Spanish)
"Glory to the Brave People"
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Motto
En unión y libertad (Spanish)
"In Union and Freedom"
Anthem
Himno Nacional Argentino
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En unión y libertad (Spanish)
"In Union and Freedom"
Anthem
Himno Nacional Argentino
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In biology, moulting (or molting,[1] also known as shedding or for some species, ecdysis) signifies the manner in which an animal routinely casts off a part of its body (often but not always an outer layer or covering), either at specific times of
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C. torquata
Binomial name
Chauna torquata
Oken, 1816
The Crested Screamer (Chauna torquata), more commonly called the Southern Screamer, belongs to the Order of Anseriformes.
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Binomial name
Chauna torquata
Oken, 1816
The Crested Screamer (Chauna torquata), more commonly called the Southern Screamer, belongs to the Order of Anseriformes.
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pest is an organism which has characteristics that are regarded as injurious or unwanted. This is most often because it causes damage to agriculture through feeding on crops or parasitising livestock, such as codling moth on apples, or boll weevil on cotton.
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Imprinting is the term used in psychology and ethology to describe any kind of phase-sensitive learning (learning occurring at a particular age or a particular life stage) that is rapid and apparently independent of the consequences of behavior.
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endangered species is a population of an organism which is at risk of becoming extinct because it is either few in number, or threatened by changing environmental or predation parameters.
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A hunt is an activity during which humans or animals chase some prey, such as wild or specially bred animals (traditionally targeted species are known as game), in order to catch or kill them, either for food, sale or hobby. See hunting.
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Anhima
Brisson, 1760
Species: A. cornuta
Binomial name
Anhima cornuta
(Linnaeus, 1766)
The Horned Screamer (
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Brisson, 1760
Species: A. cornuta
Binomial name
Anhima cornuta
(Linnaeus, 1766)
The Horned Screamer (
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C. torquata
Binomial name
Chauna torquata
Oken, 1816
The Crested Screamer (Chauna torquata), more commonly called the Southern Screamer, belongs to the Order of Anseriformes.
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Binomial name
Chauna torquata
Oken, 1816
The Crested Screamer (Chauna torquata), more commonly called the Southern Screamer, belongs to the Order of Anseriformes.
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C. chavaria
Binomial name
Chauna chavaria
Linnaeus, 1766
The Black-necked Screamer (Chauna chavaria) is a species of bird in the small family Anhimidae, the screamers.
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Binomial name
Chauna chavaria
Linnaeus, 1766
The Black-necked Screamer (Chauna chavaria) is a species of bird in the small family Anhimidae, the screamers.
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