Difference between revisions of "Cassowary"
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|subclass=Neornithes | |subclass=Neornithes | ||
|infraclass=Eoaves | |infraclass=Eoaves | ||
| − | |superorder= | + | |superorder=Palaeognathae |
|order=Struthioniformes | |order=Struthioniformes | ||
| − | |suborder= | + | |suborder=Casuarii |
| − | |infraorder= | + | |infraorder= |
|superfamily= | |superfamily= | ||
|families= | |families= | ||
| − | |family= | + | |family=Casuariidae |
|subfamily= | |subfamily= | ||
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|conservation= | |conservation= | ||
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| − | + | '''Cassowaries''' are three species of large, flightless [[bird]]s of the family Casuariidae, and found on Papua New Guinea, northern Australia, and adjacent islands, and characterized from other [[ratites]] by a bony crest on top of their heads. | |
==Description== | ==Description== | ||
| − | Cassowaries, due to their shyness and forest [[habitat]], are difficult to observe. They | + | Cassowaries, due to their shyness and forest [[habitat]], are difficult to observe. They stand up to 6 feet high when fully erect, the female slightly larger than the male, and can weigh up to 130 pounds. Smaller then their close relative, the [[emu]], they are stockier in appearance. The hair-like plumage is dark, almost black in color, and hangs loosely from the bird; since their are no barbules on the feathers, the barbs cannot link to form a vein. The rudimentary wings are hidden from view, a set of four or five stiff spine-like shafts about fifteen inches long indicating where they are. |
| − | Cassowaries | + | The head and neck are brilliantly colored, mainly blue, but red and yellow are present, depending on the species. The head is crowned with a ''casque'', a bony growth of keratin up to six inches in height. To date, no reasonable explanation has been put forward for the presence of the casque, which has been postulated as being a sound resonator, a sexual characteristic, or as an underbrush battering ram; indeed many cassowaries have been recorded showing damage to the casque, suggesting the plausibility of the battering ram theory. In his research Andrew L. Mack suggests the sound resonator may be correct<ref>http://www.bioone.org/doi/abs/10.1642/0004-8038%282003%29120%5B1062%3ALVBCCS%5D2.0.CO%3B2?journalCode=tauk</ref>, as the birds have a very low-frequency, booming call - as low as 23 Hz - necessary for communicating with each other in the dense, forested areas in which it is found. |
| + | |||
| + | Cassowaries also have a feature which has arguably made them the most dangerous birds in the world<ref>http://www.environmentalgraffiti.com/featured/cassowary-terryfying-bird-earth/10022</ref>. The powerfully-muscled legs bear three toed feet, with the inner toe bearing a five-inch, nearly-straight, claw. The claw functions as a defensive weapon, and the bird is known to attack anything it considers a threat<ref>https://www.youtube.com/watch?v=nOPVVdg8noc</ref>. Handouts fed to them by people have led to changes in behavior, increasing aggressiveness, and cited for some 150 direct and indirect attacks against humans<ref>http://journals.cambridge.org/action/displayAbstract;jsessionid=660B325B160D94C269C6A3013555568E.journals?fromPage=online&aid=66857</ref>. | ||
===Species=== | ===Species=== | ||
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*[[Northern cassowary]], ''Casuarius unappendiculatus'' | *[[Northern cassowary]], ''Casuarius unappendiculatus'' | ||
*[[Southern cassowary]], ''Casuarius casuarius'' | *[[Southern cassowary]], ''Casuarius casuarius'' | ||
| + | |||
| + | ==Diet== | ||
| + | Despite its reputation as a dangerous bird, the cassowary is primarily a fruit eater. They pluck it from trees or pick up fallen fruit from the forest floor and swallow it whole; apples, plums, wild grapes, nightshade, and myrtle are part of the diet. When fruit is not available, or when the opportunity presents itself, cassowaries also take insects, small rodents, lizards, fish, and sometimes carrion. | ||
| + | |||
| + | ==References== | ||
| + | <small><references/></small> | ||
| + | *Kofron, Christopher P. (1999). "Attacks to humans and domestic animals by the southern cassowary (''Casuarius casuarius johnsonii'') in Queensland, Australia." ''Journal of Zoology'', 249, pp 375-381. | ||
[[Category:Birds]][[Category:Flightless Birds]][[Category:Ratites]] | [[Category:Birds]][[Category:Flightless Birds]][[Category:Ratites]] | ||
Revision as of 07:23, December 18, 2013
| Cassowary | |
|---|---|
| |
| Southern cassowary Casuarius casuarius | |
| Scientific classification | |
| Kingdom Information | |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Subkingdom | Bilateria |
| Branch | Deuterostomia |
| Phylum Information | |
| Phylum | Chordata |
| Sub-phylum | Vetebrata |
| Infraphylum | Gnathostomata |
| Class Information | |
| Superclass | Tetrapoda |
| Class | Aves |
| Sub-class | Neornithes |
| Infra-class | Eoaves |
| Order Information | |
| Superorder | Palaeognathae |
| Order | Struthioniformes |
| Sub-order | Casuarii |
| Family Information | |
| Family | Casuariidae |
| Tribe Information | |
| Tribe | Casuariini |
| Genus Information | |
| Genus | Casuarius |
| Species Information | |
| Species | C. bennetti C. casuarius<br.>C. unappendiculatus |
| Population statistics | |
Cassowaries are three species of large, flightless birds of the family Casuariidae, and found on Papua New Guinea, northern Australia, and adjacent islands, and characterized from other ratites by a bony crest on top of their heads.
Description
Cassowaries, due to their shyness and forest habitat, are difficult to observe. They stand up to 6 feet high when fully erect, the female slightly larger than the male, and can weigh up to 130 pounds. Smaller then their close relative, the emu, they are stockier in appearance. The hair-like plumage is dark, almost black in color, and hangs loosely from the bird; since their are no barbules on the feathers, the barbs cannot link to form a vein. The rudimentary wings are hidden from view, a set of four or five stiff spine-like shafts about fifteen inches long indicating where they are.
The head and neck are brilliantly colored, mainly blue, but red and yellow are present, depending on the species. The head is crowned with a casque, a bony growth of keratin up to six inches in height. To date, no reasonable explanation has been put forward for the presence of the casque, which has been postulated as being a sound resonator, a sexual characteristic, or as an underbrush battering ram; indeed many cassowaries have been recorded showing damage to the casque, suggesting the plausibility of the battering ram theory. In his research Andrew L. Mack suggests the sound resonator may be correct[1], as the birds have a very low-frequency, booming call - as low as 23 Hz - necessary for communicating with each other in the dense, forested areas in which it is found.
Cassowaries also have a feature which has arguably made them the most dangerous birds in the world[2]. The powerfully-muscled legs bear three toed feet, with the inner toe bearing a five-inch, nearly-straight, claw. The claw functions as a defensive weapon, and the bird is known to attack anything it considers a threat[3]. Handouts fed to them by people have led to changes in behavior, increasing aggressiveness, and cited for some 150 direct and indirect attacks against humans[4].
Species
- Dwarf cassowary, Casuarius bennetti
- Northern cassowary, Casuarius unappendiculatus
- Southern cassowary, Casuarius casuarius
Diet
Despite its reputation as a dangerous bird, the cassowary is primarily a fruit eater. They pluck it from trees or pick up fallen fruit from the forest floor and swallow it whole; apples, plums, wild grapes, nightshade, and myrtle are part of the diet. When fruit is not available, or when the opportunity presents itself, cassowaries also take insects, small rodents, lizards, fish, and sometimes carrion.
References
- ↑ http://www.bioone.org/doi/abs/10.1642/0004-8038%282003%29120%5B1062%3ALVBCCS%5D2.0.CO%3B2?journalCode=tauk
- ↑ http://www.environmentalgraffiti.com/featured/cassowary-terryfying-bird-earth/10022
- ↑ https://www.youtube.com/watch?v=nOPVVdg8noc
- ↑ http://journals.cambridge.org/action/displayAbstract;jsessionid=660B325B160D94C269C6A3013555568E.journals?fromPage=online&aid=66857
- Kofron, Christopher P. (1999). "Attacks to humans and domestic animals by the southern cassowary (Casuarius casuarius johnsonii) in Queensland, Australia." Journal of Zoology, 249, pp 375-381.