Shelducks belong to the sub family Tadorninae and are primarily restricted to the Old World. They are often described as being intermediate between true geese and ducks. When compared to the other side of the family, they are probably more aquatic and more colorful than the larger sheldgeese.

Female shelducks are prone to quack much like the more familiar Mallard, while males offer honks or whistles. Males and females are colored much the same. In many cases the female is distinguished by white in small to large patches on the head. Both sexes have metallic green secondaries and white forewings. In addition to vegetation, they eat snails, mussels, frogs, earthworms, and insects.

They form reasonably strong pair bonds and display vigorously to one another as well as to other pairs, particularly during the breeding season. Both sexes are aggressive and the females play a role in defending the territory. Females tend to incite males to fight which often leads to one male attacking another who appears to be a potential rival. This is no doubt an integral part of pair formation. The nests are usually made in a hole in a tree, a rock, or in captivity in a nesting aid such as a wooden box with a hole in the side. More information can be found from the sources in the reference list at the bottom of this web page.

AUSTRALIAN SHELDUCKS
Scientific Name: Tadorna tadornoides

AUSTRALIAN SHELDUCKS

Look For	Male has black head white ring separating black neck from chestnut breast; female is duller than male and has a white patch around the eye and a white ring around the bill
Nesting Area	Southwestern and southeastern Australia
Wintering Area	Not Applicable
Nest Site	Nests are usually in tree holes, but in treeless areas rabbit holes are utilized, and occasionally ground nesting occurs in well-wooded areas, in captivity ground boxes or upright boxes are selected
Initial Nest	During spring-summer of second year
When	Middle of June through September in the nesting area
Clutch Size	10 to 14 eggs
Incubation	Approximately 30 to 35 days
More Information Tadorna tadornoides	Australian Shelducks
Recent Research Tadorna tadornoides	International Shelducks Research Archive: Australian Shelducks
Classroom Connectors Tadorna tadornoides	International Shelducks Curricular Materials Archive: Australian Shelducks

CAPE SHELDUCKS
Scientific Name: Tadorna cana

CAPE SHELDUCKS

Look For	Medium size burnt orange; male with distinct gray head; female gray head with white Lone Ranger mask
Nesting Area	Southern tip of South Africa
Wintering Area	Not Applicable
Nest Site	Holes, in captivity ground boxes or upright boxes are selected
Initial Nest	During spring-summer of second year
When	July or August until November in the nesting area, May until July at Chenoa
Clutch Size	6 to 15 eggs
Incubation	Approximately 30 days
More Information Tadorna cana	Cape Shelducks
Recent Research Tadorna cana	International Shelducks Research Archive: Cape Shelducks
Classroom Connectors Tadorna cana	International Shelducks Curricular Materials Archive: Cape Shelducks

COMMON SHELDUCKS
Scientific Name: Tadorna tadorna

COMMON SHELDUCKS

Look For	Male has head and upper neck of black, lower neck and upper chest of white, lower chest of chestnut, and bright red bill with a knob; female slightly duller, smaller, and without knob on bill
Nesting Area	British Isles, northern France, the Netherlands, Germany, Denmark, etc.; Western European populations are sedentary
Wintering Area	South to Spain, the Mediterranean, north Africa, Iran, northern India, southern China, and Japan
Nest Site	Nests on the ground or in a used rabbit burrow, occasionally tree holes are used, in captivity ground boxes or upright boxes are selected
Initial Nest	During spring-summer of second year
When	From early May onwards in the nesting area
Clutch Size	7 to 12 eggs
Incubation	Approximately 28 to 30 days
More Information Tadorna tadorna	Common Shelducks
Recent Research Tadorna tadorna	International Shelducks Research Archive: Common Shelducks
Classroom Connectors Tadorna tadorna	International Shelducks Curricular Materials Archive: Common Shelducks

CRESTED SHELDUCKS
Scientific Name: Tadorna cristata

CRESTED SHELDUCKS Photo courtesy of Natural History of the Waterfowl by Frank S. Todd

Look For	Male is black on the crown of the head, nape, breast, upper tail coverts, tail, and primaries while the rest of the head is brownish black; females have a small white eye-ring, and the head and neck are also white except for the crown stripe and crest, most of the rest of the body is dark brown with narrow white lines
Nesting Area	Slim chance of survival in areas such as the border areas of USSR, China, and North Korea where they may nest in forested, mountainous districts by flowing rivers and streams
Wintering Area	Lower down the rivers of the border areas of USSR, China, and North Korea towards coastal districts and occasionally to Japan
Nest Site	Unknown
Initial Nest	Unknown
When	Unknown
Clutch Size	Unknown
Incubation	Unknown
More Information Tadorna cristata	Crested Shelducks
Recent Research Tadorna cristata	International Shelducks Research Archive: Crested Shelducks
Classroom Connectors Tadorna cristata	International Shelducks Curricular Materials Archive: Crested Shelducks

PARADISE SHELDUCKS
Scientific Name: Tadorna variegata

PARADISE SHELDUCKS

Look For	Male is mostly black and is similar to Australian male in color but lacks the chestnut breast; female has head and neck of pure white and body is rich chestnut
Nesting Area	New Zealand, but rare in the north
Wintering Area	Not Applicable
Nest Site	Nests on the ground in the vegetation or in a burrow
Initial Nest	During spring-summer of second year
When	Middle of June to late September in the nesting area
Clutch Size	5 to 11 eggs
Incubation	Approximately 30 days
More Information Tadorna variegata	Paradise Shelducks
Recent Research Tadorna variegata	International Shelducks Research Archive: Paradise Shelducks
Classroom Connectors Tadorna variegata	International Shelducks Curricular Materials Archive: Paradise Shelducks

RADJAH SHELDUCKS
Scientific Name: Tadorna radjah radjah

RADJAH SHELDUCKS

Look For	Both sexes are of similar plumage and appear as white birds with black mantle, narrow breast band, back, rump, and tail with flesh pink bill
Nesting Area	Moluccas, Aru Islands, and New Guinea
Wintering Area	Not Applicable
Nest Site	Nests are in the hollow limbs of trees, no nest material is used except for some down, in captivity ground boxes or upright boxes are selected
Initial Nest	During spring-summer of second year
When	February and July in nesting area
Clutch Size	6 to 12 eggs
Incubation	Approximately 30 days
More Information Tadorna radjah radjah	Radjah Shelducks
Recent Research Tadorna radjah radjah	International Shelducks Research Archive: Radjah Shelducks
Classroom Connectors Tadorna radjah radjah	International Shelducks Curricular Materials Archive: Radjah Shelducks

RUDDY SHELDUCKS
Scientific Name: Tadorna ferruginea

RUDDY SHELDUCKS

Look For	Medium size, light orange; male with cream head; female cream head with white Lone Ranger mask
Nesting Area	North Africa, and central Asia
Wintering Area	Central Africa, India, Burma, Thailand, Vietnam, and Korea
Nest Site	Holes, in captivity ground boxes or upright boxes are selected
Initial Nest	During spring-summer of second year
When	March until May in the nesting area, May until July at Chenoa
Clutch Size	8 to 12 eggs, but may be as many as 16
Incubation	Approximately 28 days
More Information Tadorna ferruginea	Ruddy Shelducks
Recent Research Tadorna ferruginea	International Shelducks Research Archive: Ruddy Shelducks
Classroom Connectors Tadorna ferruginea	International Shelducks Curricular Materials Archive: Ruddy Shelducks

Johnsgard, Paul. Ducks, Geese, and Swans of the World. Lincoln: The University of Nebraska Press. 1978.

Madge and Burn. Waterfowl: An Identification Guide to the Ducks, Geese, and Swans of the World. New York: Houghton Mifflin Company. 1988.

Patterson, I. J. The Shelduck: A Study in Behavioral Ecology.Cambridge University Press, Cambridge. 1982.

Soothill and Whitehead. Wildfowl of the World. Dorset, Great Britain: Blandford Press. 1978.

Todd, Frank S. Handbook of Waterfowl Identification. Vista, California: Ibis Publishing Company, 1997.

Todd, Frank S. Natural History of the Waterfowl. Vista, California: Ibis Publishing Company, 1997.

Todd, Frank S. Waterfowl: Ducks, Geese and Swans of the World. San Diego, California: Sea World Press, 1979.

Weller, Milton W. The Island Waterfowl. Ames, Iowa: Iowa State University Press, 1980.

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Waterfowl of Chenoa Home Page

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Last Modified Wednesday, 13-Jul-2005 13:44:30 CDT