Cape Shelduck

Tadorna cana (Gmelin & JF 1789)

2005 California Academy of Sciences cc-by-nc-sa-3.0

Tadorna cana (Cape Shelduck) is a species of birds in the family Anatidae. They are associated with freshwater habitat. They are found in Afrotropics. They are diurnal herbivores. They have parental care (pair provides care). They rely on flight and drag powered swimming to move around.

URI: http://purl.obolibrary.org/obo/ENVO_00000873
Definition: A biome that applies to the freshwater realm.

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URI: http://eol.org/schema/terms/Afrotropical
Attribution: https://www.oneearth.org/realms/afrotropics/

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URI: https://www.wikidata.org/entity/Q59099
Definition: animal anatomically and physiologically adapted to eating plant material

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URI: http://www.wikidata.org/entity/Q906470
Definition: animal behavior characterized by activity during the day, with a period of inactivity at night.

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URI: http://eol.org/schema/terms/parentalCarePair
Definition: Both parents feed and nurture offspring.
Attribution: Richard M. Sibly, Christopher C. Witt, Natalie A. Wright, Chris Venditti, Walter Jetz, and James H. Brown. 2012. Energetics, lifestyle, and reproduction in birds. PNAS 109(27):10937-10941, doi:10.1073/pnas.1206512109

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URI: http://purl.obolibrary.org/obo/NBO_0000367
Definition: self-propelled movement of an organism from one location to another through the air, usually by means of active wing movement

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URI: https://eol.org/schema/terms/drag_based_swimming
Definition: Drag swimmers use a cyclic motion where they push water back in a power stroke, and return their limb forward in the return or recovery stroke. When they push water directly backwards, this moves their body forward, but as they return their limbs to the starting position, they push water forward, which will thus pull them back to some degree, and so opposes the direction that the body is heading. This opposing force is called drag. The return-stroke drag causes drag swimmers to employ different strategies than lift swimmers. Reducing drag on the return stroke is essential for optimizing efficiency.

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EOL has data for 30 attributes, including:

Body symmetry
- URI: http://eol.org/schema/terms/body_symmetry
- Definition: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
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bilaterally symmetric
- URI: http://purl.obolibrary.org/obo/PATO_0001324
- Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves
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auditory system
- URI: http://purl.obolibrary.org/obo/UBERON_0016490
- Definition: the sensory system for the sense of hearing
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otoliths
- URI: https://www.wikidata.org/entity/Q591800
- Definition: Inner-ear structure in vertebrates which detects acceleration and may detect acoustic signals
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biogeographic realm
- URI: http://purl.obolibrary.org/obo/GAZ_00000071
- Definition: The largest scale biogeographic division of the earth's surface based on the historic and evolutionary distribution patterns of plants and animals.
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Afrotropics
- URI: http://eol.org/schema/terms/Afrotropical
- Attribution: https://www.oneearth.org/realms/afrotropics/
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body mass
- URI: http://purl.obolibrary.org/obo/VT_0001259
- Definition: The amount of matter in the body of an organism.
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1183 g
cellularity
- URI: http://purl.obolibrary.org/obo/PATO_0001992
- Definition: An organismal quality inhering in a bearer by virtue of the bearers consisting cells. [ PATOC:GVG ]
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multicellular
- URI: http://purl.obolibrary.org/obo/PATO_0001993
- Definition: A cellularity quality inhering in a bearer by virtue of the bearers consisting of more than one cell. [ PATOC:GVG ]
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foraging habitat
- URI: http://eol.org/schema/terms/ForagingHabitat
- Definition: Primary habitat where the species forages during the breeding season.
- Attribution: Richard M. Sibly, Christopher C. Witt, Natalie A. Wright, Chris Venditti, Walter Jetz, and James H. Brown. 2012. Energetics, lifestyle, and reproduction in birds. PNAS 109(27):10937-10941, doi:10.1073/pnas.1206512109
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freshwater
- URI: http://purl.obolibrary.org/obo/ENVO_00000873
- Definition: A biome that applies to the freshwater realm.
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geographic distribution includes
- URI: http://eol.org/schema/terms/Present
- Definition: This organism is known to be present in this location or region. Not exclusive; other regions may also be reported.
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South Africa
- URI: http://www.geonames.org/953987
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habitat
- URI: http://purl.obolibrary.org/obo/RO_0002303
- Definition: x has habitat y if: x is an organism, y is a habitat, and y can sustain and allow the growth of a population of x
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terrestrial
- URI: http://purl.obolibrary.org/obo/ENVO_00000446
- Definition: A biome that applies to the terrestrial realm.
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habitat
- URI: http://rs.tdwg.org/dwc/terms/habitat
- Definition: A category or description of the habitat in which the Event occurred.
- Comment: Example: "oak savanna", "pre-cordilleran steppe"
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terrestrial
- URI: http://purl.obolibrary.org/obo/ENVO_00000446
- Definition: A biome that applies to the terrestrial realm.
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locomotion
- URI: http://purl.obolibrary.org/obo/GO_0040011
- Definition: Self-propelled movement of a cell or organism from one location to another.
- Attribution: [database_cross_reference: GOC:dgh]
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flight
- URI: http://purl.obolibrary.org/obo/NBO_0000367
- Definition: self-propelled movement of an organism from one location to another through the air, usually by means of active wing movement
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population trend
- URI: http://eol.org/schema/terms/population_trend
- Definition: i.e., increasing, decreasing, stable, or unknown
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Increasing
visual system
- URI: http://purl.obolibrary.org/obo/UBERON_0002104
- Definition: The sensory system subserving the sense of vision.
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corneal eyes
- URI: https://eol.org/schema/terms/corneal_eyes
- Definition: Because of the difference in refractive index between air and water (or corneal tissue), a curved cornea is an image-forming lens in its own right. Its focal length is determined by the radius of curvature of the cornea. Many corneal eyes (eg: in land vertebrates) also have lenses, but the lens is flattened and weakened compared with an aquatic lens; most of the refractive power is provided by the cornea. Corneal eyes cannot focus in aquatic habitat.
- Attribution: https://www.britannica.com/science/photoreception/Single-chambered-eyes#ref278820
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Known occurrences, collected specimens and observations of Cape Shelduck. View this species on GBIF

2005 California Academy of Sciences cc-by-nc-sa-3.0