View allAll Photos Tagged cygnus
Cygnus cygnus (Linnaeus, 1758), Whooper Swan and Cygnus olor
(Gmelin, 1789), Mute Swan, Sydvestpynten, Copenhagen, Denmark, 21 January 2018
Two that were running on the water shortly before this photo was taken.
Great, powerful form in these two birds.
I think that they look large in this photo, but that's probably got to do with the wings, and also that they are fairly large.
Cygnus atratus (Black Swan) and Chroicocephalus novaehollandiae (Silver Gulls) in Fairy Lagoon, North Wollongong.
Celebrating astronomy in this International Year of Light, the detailed image reveals spectacular active galaxy Cygnus A in light across the electromagnetic spectrum. Incorporating X-ray data (blue) from the orbiting Chandra Observatory, Cygnus A is seen to be a prodigious source of high energy x-rays. But it is actually more famous at the low energy end of the electromagnetic spectrum. One of the brightest celestial sources visible to radio telescopes, at 600 million light-years distant Cygnus A is the closest powerful radio galaxy. Radio emission (red) extends to either side along the same axis for nearly 300,000 light-years powered by jets of relativistic particles emanating from the galaxy's central supermassive black hole. Hot spots likely mark the ends of the jets impacting surrounding cool, dense material. Confined to yellow hues, optical wavelength data of the galaxy from Hubble and the surrounding field in the Digital Sky Survey complete a remarkable multiwavelength view. via NASA 1.usa.gov/1B7eRIl
Class: Aves.
Subclass: Galloanserae.
Superorder: Anserimorphae.
Order: Anseriformes.
Suborder: Anseri.
Superfamily: Anatoidea.
Family: Anatidae.
(20.02.2011)
La tradizione poetica gli attribuisce un suono, che emetterebbe quando è nel periodo degli amori (il famoso canto del cigno), che però ben pochi possono vantarsi d'aver udito. Grigi alla nascita, diventano bianchi solo da adulti.