MadSci Network: Zoology
Query:

Re: WHAT IS THE GESTATION PERIOD OF A DUCK

Date: Mon May 1 08:42:35 2000
Posted By: June Wingert, RM(NRM),Research Associate
Area of science: Zoology
ID: 956782636.Zo
Message:

The following sites provided a tremendous amount of information concerning 
ducks.
Hope you enjoy the information.

http://www.kiddyhouse.com/Farm/ducks.html

http://www.utm.edu/departments/ed/cece/ducks.shtml 

Ducks belong to the sub family Anatinae. Not only is this grouping the largest 
group of waterfowl it is also the most diverse.
The characteristics generally held in common by ducks when compared to geese and 
swans are the small body size, shorter
necks, narrower wings which are more pointed, and wing beats which are more 
rapid.

Frequently the males and females are colored differently with the male having 
the brighter plumage of the two. There are two
body molts per molting cycle. The most significant is the eclipse which is the 
cycle that takes place during the end of the
breeding season that results in males and females looking almost identical. 
Another characteristic is the speculum which is
produced by the bright metallic feathering of the secondary feathers. There are 
also voice differences between the male and
the female. The female incubates and rears the young. More information can be 
found from the sources in the reference list at
the bottom of this web page.

                                  DABBLING DUCKS

AMERICAN BLACK
Scientific Name: Anas rubripes


                                      AMERICAN BLACK


  Look For
               Mallard-size, mottled, dark black-brown; male has greener beak 
than female and is slightly larger
  Nesting Area
               West coast of Hudson Bay, Labrador south to Iowa, Illinois, Ohio, 
and North Carolina
  Wintering Area
               Wisconsin south to northern Florida and central Texas
  Nest Site
               Ground boxes, weeded areas; not guarded by male
  Initial Nest
               During spring-summer of first year
  When
               April until June in the nesting area and at Chenoa
  Clutch Size
               10 to 12 eggs
  Incubation
               Approximately 28 days


LAYSAN TEAL (ENDANGERED)
Scientific Name: Anas platyrhyncos laysanensis


                                         LAYSAN TEAL


  Look For
               Male has dark head and neck, white ring around the eye, resembles 
female mallard, but more
               reddish-brown, green and black speculum; female similar to male 
with brown speculum
  Nesting Area
               Laysan Island
  Wintering Area
               Not Applicable
  Nest Site
               On the ground under Chenopodium or Scaerola bushes
  Initial Nest
               During spring-summer of first year
  When
               Early May until June
  Clutch Size
               5 to 6 eggs
  Incubation
               Approximately 26 to 28 days


MALLARD
Scientific Name: Anas platyrhynchos platyrhynchos


                                           MALLARD


  Look For
               Male has metallic green head and neck separated from the 
purplish-brown breast by a white ring;
               females are mottled, buffy-brown in color with a pale eye-brow 
and a dark stripe through the eye
  Nesting Area
               Throughout the Northern Hemisphere in places where climatic 
conditions are not too severe
  Wintering Area
               Amost to the Tropic of Cancer and in North Africa as far south as 
the northern Sudan
  Nest Site
               Ground boxes, weeded areas where the nest is concealed beneath 
the undergrowth, usually near water;
               not guarded by male
  Initial Nest
               During spring-summer of first year
  When
               April until June in the nesting area and at Chenoa
  Clutch Size
               10 to 12 buffish-green eggs
  Incubation
               Approximately 28 days


                                  PERCHING DUCKS

MANDARIN
Scientific Name: Aix galericulata


                                          MANDARIN


  Look For
               Males have triangular orange feathers over back; females are 
mottled light brown with eye over a white
               line
  Nesting Area
               Manchuria, Northeastern China, and Japan
  Wintering Area
               Sedentary in Japan, South of Yangtze in China
  Nest Site
               Nests on the ground in the vegetation or in old tree nests of 
other species
  Initial Nest
               During spring-summer of first year
  When
               April and May in nesting area and Chenoa
  Clutch Size
               9 to 12 eggs
  Incubation
               Approximately 28 to 30 days


MANED GOOSE
Scientific Name: Chenonetta jubata


                                        MANED GOOSE


  Look For
               Males with dark brown head and neck, while back, rump, tail, and 
belly are black, with breast and sides
               grayish; females head and neck are pale brown with white lines 
above and below the eye
  Nesting Area
               Australia and Tasmania
  Wintering Area
               Not Applicable
  Nest Site
               Nests are in suitable tree holes
  Initial Nest
               During spring-summer of second year
  When
               January to March in New South Wales, but may be found at any time 
during the year, August to
               September is often the peak inland
  Clutch Size
               9 to 11 eggs
  Incubation
               Approximately 28 days


WOOD DUCK
Scientific Name: Aix sponsa


                                         WOOD DUCK
                                FEMALE WOOD DUCK ON NEST


  Look For
               Males with green head crest and gray sides, females are mottled, 
medium brown, white line runs toward
               eye, eye with a white circle around it
  Nesting Area
               Virtually the entire eastern United States; has been encouraged 
by man-made nest boxes placed near
               water
  Wintering Area
               Southern half of range
  Nest Site
               Upright boxes and holes in trees made by natural decay or by 
woodpeckers; nest is loosely guarded by
               male when female is inside
  Initial Nest
               During spring-summer of first year
  When
               Late March until June in the nesting area and at Chenoa
  Clutch Size
               9 to 14 eggs (two clutches at Chenoa at 10 average)
  Incubation
               Approximately 31 to 35 days


                                   POCHARD DUCKS

CANVAS BACK
Scientific Name: Aythya valisineria


                                         CANVAS BACK


  Look For
               Diving duck; males have redish brown head, light gray sides; 
female is light brown with a mottled
               appearance
  Nesting Area
               Central Alaska south to central Oregon and northern Utah, New 
Mexico, and southern Nebraska
  Wintering Area
               Chesapeake Bay and San Fransico Bay
  Nest Site
               Bulky well-concealed nest usually amongst reeds or rushes
  Initial Nest
               During spring-summer of first year
  When
               Second week of May
  Clutch Size
               7 to 10 eggs 
  Incubation
               Approximately 23 to 29 days


RED-CRESTED
Scientific Name: Netta rufina


                                         RED-CRESTED


  Look For
               Diving duck; males have red head, light gray sides, neck and 
breast are black, bill is bright red; female
               has dark brown head and nape with whitish cheeks and foreneck
  Nesting Area
               Small numbers in Denmark, Germany, Rumania, Netherlands, and 
Czechoslovakia; more in France,
               Spain, and USSR
  Wintering Area
               South to Mediterranean, Black, and Caspian Seas
  Nest Site
               On islands or in dense vegetation near water's edge and with a 
tunnel approach; constructed of grass and
               leaves
  Initial Nest
               During spring-summer of first year
  When
               May and June in the nesting area
  Clutch Size
               6 to 14 eggs
  Incubation
               Approximately 26 to 28 days


RING-BILLED
Scientific Name: Aythya collaris


                                         RING-BILLED


  Look For
               Diving duck; males have black head, light gray sides, white 
stripes on beak; female is chocolate brown,
               white cheeks and base of bill
  Nesting Area
               Entire Northern boundary of United States to Nova Scotia, 
Labrador, British Columbia and Great Slave
               Lake
  Wintering Area
               Entire southern United States
  Nest Site
               Among weeds near water, ground boxes, or hole in lake bank
  Initial Nest
               During spring-summer of first year
  When
               May and June in the nesting area
  Clutch Size
               6 to 14 eggs
  Incubation
               Approximately 26 to 27 days


ROSY-BILLED
Scientific Name: Netta peposaca


                                         ROSY-BILLED


  Look For
               Diving duck; male has black head, gray sides, and bright red 
beak; female is medium brown with bluish
               gray beak
  Nesting Area
               Southern Brazil, Paraguay, Uruguay, and Argentina
  Wintering Area
               Not Applicable
  Nest Site
               Ground boxes or in tall weeds which serve as canopy to shade and 
hide nest
  Initial Nest
               During spring-summer of first year
  When
               October until December in the nesting area, June until July at 
Chenoa
  Clutch Size
               Up to 14 eggs
  Incubation
               Approximately 23 to 25 days




Current Queue | Current Queue for Zoology | Zoology archives

Try the links in the MadSci Library for more information on Zoology.



MadSci Home | Information | Search | Random Knowledge Generator | MadSci Archives | Mad Library | MAD Labs | MAD FAQs | Ask a ? | Join Us! | Help Support MadSci


MadSci Network, webadmin@www.madsci.org
© 1995-2000. All rights reserved.