Bird (English Wikipedia)

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allaboutbirds.org

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archive.org

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archives-ouvertes.fr

hal.archives-ouvertes.fr

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audubon.org

Jones, Benji (7 August 2018). "What Are Fecal Sacs? Bird Diapers, Basically". Audubon. Retrieved 17 January 2021.
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bbc.co.uk

news.bbc.co.uk

Kinver, Mark (13 May 2009). "Birds at risk reach record high". BBC News Online. Retrieved 15 May 2009.

bepress.com

works.bepress.com

Belthoff, James R.; Dufty; Gauthreaux (1 August 1994). "Plumage Variation, Plasma Steroids and Social Dominance in Male House Finches". The Condor. 96 (3): 614–625. doi:10.2307/1369464. JSTOR 1369464.

bib-arch.org

Resig, Dorothy D. (9 February 2013). "The Enduring Symbolism of Doves, From Ancient Icon to Biblical Mainstay". BAR Magazine Bib-arch.org. Archived from the original on 31 January 2013. Retrieved 5 March 2013.

biodiversitylibrary.org

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biologists.org

jeb.biologists.org

Sato, Katsufumi; Naito, Y.; Kato, A.; Niizuma, Y.; Watanuki, Y.; Charrassin, J. B.; Bost, C. A.; Handrich, Y.; Le Maho, Y. (1 May 2002). "Buoyancy and maximal diving depth in penguins: do they control inhaling air volume?". Journal of Experimental Biology. 205 (9): 1189–1197. doi:10.1242/jeb.205.9.1189. PMID 11948196.
Klaassen, Marc (1 January 1996). "Metabolic constraints on long-distance migration in birds". Journal of Experimental Biology. 199 (1): 57–64. Bibcode:1996JExpB.199...57K. doi:10.1242/jeb.199.1.57. PMID 9317335.
Bäckman, Johan; A (1 April 2002). "Harmonic oscillatory orientation relative to the wind in nocturnal roosting flights of the swift Apus apus". The Journal of Experimental Biology. 205 (7): 905–910. Bibcode:2002JExpB.205..905B. doi:10.1242/jeb.205.7.905. PMID 11916987.

biostor.org

Gauthier, Jacques (1986). "Saurischian monophyly and the origin of birds". In Padian, Kevin (ed.). The Origin of Birds and the Evolution of Flight. Memoirs of the California Academy of Science. Vol. 8. San Francisco, CA: Published by California Academy of Sciences. pp. 1–55. ISBN 0-940228-14-9.

birdlife.org

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books.google.com

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cam.ac.uk

repository.cam.ac.uk

Field, Daniel J.; Benito, Juan; Chen, Albert; Jagt, John W. M.; Ksepka, Daniel T. (March 2020). "Late Cretaceous neornithine from Europe illuminates the origins of crown birds". Nature. 579 (7799): 397–401. Bibcode:2020Natur.579..397F. doi:10.1038/s41586-020-2096-0. PMID 32188952.

cia.gov

"Flag description - the World Factbook".

cornell.edu

birds.cornell.edu

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bna.birds.cornell.edu

Spreyer, Mark F.; Enrique H. Bucher (1998). "Monk Parakeet (Myiopsitta monachus)". The Birds of North America. Cornell Lab of Ornithology. doi:10.2173/bna.322. Retrieved 13 December 2015.

cosmosmagazine.com

archive.cosmosmagazine.com

Agency France-Presse (April 2011). "Birds survived dino extinction with keen senses". Cosmos Magazine. Archived from the original on 2 April 2015. Retrieved 11 June 2012.

csbsju.edu

employees.csbsju.edu

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csiro.au

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Frith, C. B. (1981). "Displays of Count Raggi's Bird-of-Paradise Paradisaea raggiana and congeneric species". Emu. 81 (4): 193–201. Bibcode:1981EmuAO..81..193F. doi:10.1071/MU9810193.

doi.org

Field, Daniel J.; Benito, Juan; Chen, Albert; Jagt, John W. M.; Ksepka, Daniel T. (March 2020). "Late Cretaceous neornithine from Europe illuminates the origins of crown birds". Nature. 579 (7799): 397–401. Bibcode:2020Natur.579..397F. doi:10.1038/s41586-020-2096-0. PMID 32188952.
De Pietri, Vanesa L.; Scofield, R. Paul; Zelenkov, Nikita; Boles, Walter E.; Worthy, Trevor H. (February 2016). "The unexpected survival of an ancient lineage of anseriform birds into the Neogene of Australia: the youngest record of Presbyornithidae". Royal Society Open Science. 3 (2): 150635. Bibcode:2016RSOS....350635D. doi:10.1098/rsos.150635. PMC 4785986. PMID 26998335.
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