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June 16, 2011

Facts about Swans

Filed under: Swans--Pentu and Teller, Uncategorized — buckhorn @ 8:56 pm







Swans get our vote for the natural world’s most graceful and beautiful creature. The beautiful snowy feathers and long graceful neck have created a picture that many artists have worked hard to recreate. There are logos, associations, organizations, home décor and more inspired by the beauty.

  • The mute swan is the one that most Americans and Europeans are familiar with
  • A swan mates for life
  • There are three species of swans found in North America:
  • Trumpeter: Black bill with red border on lower mandible; the red border may be present on some tundras. The eye is hard to distinguish, fading into the bill and the slope of bill is straighter.
  • Tundra: Black bill, usually with yellow spot of varying size in front of the eye; the spot may be absent on some. The eye is separate from the bill.
  • Mute: Orange bill with prominent black knob (called a caruncle) at base—Pentu and Teller are Mute Swans.
  • The black swan is native to Australia.
  • The adult male is called a cob. He is the only known bird to have a penis.
  • He is both a devoted father and husband. He has been known to use a blow from the “knucklebone” of his wing to defend his family. His blow is said to be strong enough to break a man’s arm according to Donald and Louise Peattie in “Legend with Wings.”
  • The Mute Swan is perhaps the noisiest of all swans having eight different sounds in its repertoire
  • Swans can fly as fast as 50 to 60 miles per hour
  • Some have a wing span of 10 feet
  • Swans were nearing extinction in the 1930s in the U.S. but due to measures taken to protect them their population is again growing.
  • A baby swan or cygnet has a grey feathered coat until it reaches about 20 pounds. Then it too will become snowy white like its parents.
  • The black necked swan is native to South America. 
  • A baby swan pecks at the inside of the egg for 24 hours prior to making its entrance
  • The female swan is referred to as a pen
  • Visually the most noticeable difference between the male and female swan is size, unlike many other animals where the male and female are colored differently
  • The typical weight of a swan is from 11.3 to 15.88 kg (25 to 35 pounds) and height while standing alert 4 feet or 1.2 meters.
  • From the tip of the bill to the end of their tail they measure 5 feet or 1.5 meters.
  • The regal beauty is one of the reasons for the swan to be considered as a royal bird in England and all swans found in the open waters belong to the crown
  • A mother swan has a sound similar to a yipping puppy, which it uses to call the young to her
  • Swans are the largest known flying bird
  • They are not known to attack humans without cause, and actually can remember humans that have been kind to them
  • They dine off of aquatic vegetation, insects, tiny fish and tadpoles. Because they are able to reach far below the water’s surface, they have actually broken plants apart and left them floating on the water which enables smaller birds to find ready food.
  • The mute swan’s neck has 23 vertebrae, which is more than any other bird
  • Their life expectancy in a protected environment is as long as 30 years
  • In Canada the swans of Lost Lagoon have their wing tendons clipped to keep them from flying away. While they cannot fly they can raise themselves above the water surface for a quick get away or to protect their young.

 

1 Comment »

  1. A few other birds do have a penis, though most have only cloacas. At nearly 40 years old, and after having asked my grandmother to no avail (pretty sure she didn’t really know, either), I had to google how birds mate! I found the following information interesting:

    http://birding.about.com/library/weekly/…explains:

    During breeding season in response to the hormones, the male’s testes become several hundred times larger than normal to produce sperm, with the left testis usually larger. The female bird’s ovaries also enlarge during breeding season to produce the ovum. Female birds usually only have one functional ovary, the left one.

    In birds, an ovum is fertilized in the female bird’s oviduct by a sperm cell from the male bird. Once fertilized, the ovum becomes the nucleus of the egg. The egg, that has its own food source, the yolk, will be laid by the female into her nest, incubated, and then the baby bird will hatch.

    But how does the sperm from the male bird get into the female? How can they have intercourse without any external male organs, such as a penis? The male’s sperm, produced in the testes, passes to the cloaca where it is stored until copulation (act of sex). The female also has a cloaca that leads from the ovaries. The female bird unfans her tail, moves it to one side while the male climbs up onto her back or gets close to her. Their cloacas are pressed together and the sperm moves from the male to the female. This act is called a cloacal kiss…

    The sperm is stored by the female for at least a week, in some species over a hundred days. Then as each ovum from the ovary moves into the oviduct, it gets fertilized with the stored sperm, producing a clutch of many eggs, all with the sperm from that one cloacal kiss.

    There are a few species of birds where the males do possess a retractable penis that can be pulled back into the bird. These birds include ostriches, cassowaries, kiwis, swans, geese, and ducks. Since waterfowl sometimes make love while in the lake or pond, the penis helps ensure that the sperm is not washed away by the water.

    Sperm can be transferred from male cloaca to the female in a blink of an eye – less than a second. Some birds seem to want to linger longer though, sometimes having sex for more than an hour! And, although it is not necessary to copulate frequently since the sperm is stored within the female, remember those hormones are still making the birds excited. Many pairs of birds will mate numerous times within a few days.

    Comment by Sandy — June 19, 2011 @ 6:38 pm

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