From Dinosaurs to Birds Analytical Essay by Nicky

From Dinosaurs to Birds
Looks at how birds evolved from their dinosaur ancestors.
# 148319 | 1,755 words | 15 sources | MLA | 2011 | US
Published on Oct 11, 2011 in Biology (Zoology)

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This paper traces the history of the evolutionary studies, which have concluded that birds evolved from dinosaurs, and reviews alternative theories of the origin of birds. Next, the author presents the evolution of feathers and flight, the physiology and skeletal similarity of dinosaurs and bird and the molecular evidence of the dinosaurian origins of birds. The paper concludes that most paleontologists agree that birds have descended from the coelurosaurs line of dinosaurs, which had features that were remarkably similar to birds; however, there remains debate over the origin and purpose of the evolution of feathers since feathers also have been found in many non-avian dinosaurs

Table of Contents:
Brief History of Dinosaurs
Source of the Dinosaurian Origin of Bird's Theory
Alternative Theories of Bird Origin
Evolution of Feathers and Flight
Dinosaur and Bird Physiology
Skeletal Similarities between Dinosaurs and Birds
Molecular Evidence of Dinosaurian Origins

From the Paper:

"All modern-day birds are endothermic and scientists have reasoned that their immediate coelurosaurian ancestors might have been endothermic as well. However, enough evidence has been gathered to prove that some of the dinosaurs were, in fact, ectothermic. Nevertheless, some dinosaurian features do suggest that some of the dinosaurs were endotherms. These features include an upright posture and locomotion as evidenced from trackways, body size and length of specific body parts, and soft-part anatomy like organs and feathers. An upright posture is normally associated with increased mobility and activity which in turn is related to food requirements and metabolism."

Sample of Sources Used:

  • Alexander, David E; Vogel, Steven (FRW). Nature's flyers. JHU Press, 2004.
  • Davies, Gareth Huw. Evolution. Retrieved 28 April, 2009 from
  • Farlow, James O; Brett-Surman, M. K; Walters, Robert F. The Complete Dinosaur. Indiana University Press, 1999.
  • Hill, Jon; Davis, Katie. The Origin and Early Evolution of Birds. 2007. Retrieved 28 April, 2009 from
  • Long, John A; Schouten, Peter. Feathered Dinosaurs. Oxford University Press US, 2008.

Cite this Analytical Essay:

APA Format

From Dinosaurs to Birds (2011, October 11) Retrieved April 22, 2021, from

MLA Format

"From Dinosaurs to Birds" 11 October 2011. Web. 22 April. 2021. <>