Delwedd:Pelecanoides georgicus (South Georgian diving-petrel) (8365384976).jpg

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Daw'r ffeil hon o Comin Wikimedia a gellir ei defnyddio gan brosiectau eraill. Dangosir isod y disgrifiad sydd ar dudalen ddisgrifio'r ffeil yno.

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Disgrifiad

Pelecanoides georgicus Murphy & Harper, 1916 - South Georgian diving-petrel (mount, Field Museum of Natural History, Chicago, Illinois, USA).

Classification: Animalia, Chordata, Vertebrata, Aves, Procellariiformes, Pelecanoididae


Birds are small to large, warm-blooded, egg-laying, feathered, bipedal vertebrates capable of powered flight (although some are secondarily flightless). Many scientists characterize birds as dinosaurs, but this is consequence of the physical structure of evolutionary diagrams. Birds aren’t dinosaurs. They’re birds. The logic & rationale that some use to justify statements such as “birds are dinosaurs” is the same logic & rationale that results in saying “vertebrates are echinoderms”. Well, no one says the latter. No one should say the former, either.

However, birds are evolutionarily derived from theropod dinosaurs. Birds first appeared in the Triassic or Jurassic, depending on which avian paleontologist you ask. They inhabit a wide variety of terrestrial and surface marine environments, and exhibit considerable variation in behaviors and diets.
Dyddiad
Ffynhonnell Pelecanoides georgicus (South Georgian diving-petrel)
Awdur James St. John

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w:en:Creative Commons
cydnabyddiaeth
Trwyddedir y ffeil hon yn ôl termau'r drwydded Creative Commons Attribution 2.0 Generic.
Mae'n rhydd i chi:
  • rhannu – gallwch gopïo, dosbarthu a throsglwyddo'r gwaith
  • ailwampio – gallwch addasu'r gwaith
Ar yr amodau canlynol:
  • cydnabyddiaeth – Mae'n rhaid i chi nodi manylion y gwaith hwn, rhoi dolen i'r drwydded, a nodi os y bu golygu arni, yn y modd a benwyd gan yr awdur neu'r trwyddedwr (ond heb awgrymu o gwbl eu bod yn eich cymeradwyo chi na'ch defnydd o'r gwaith).
This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/8365384976. It was reviewed on 5 Mawrth 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

5 Mawrth 2015

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South Georgian diving-petrel (Pelecanoides georgicus)

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yn portreadu

captured with Saesneg

Nikon D70s Saesneg

10 Mehefin 2011

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cyfredol19:54, 5 Mawrth 2015Bawdlun y fersiwn am 19:54, 5 Mawrth 20151,687 × 1,720 (970 KB)NitrausTransferred from Flickr via Flickr2Commons

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