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Argentavis

Argentavis ( Latin: Argentavis magnificens , literally - “a majestic Argentine bird”) is a species of extinct birds of the Teratornithidae family, which lived in the Upper Miocene in South America .

† Argentavis
Argentavis magnificens.JPG
Figure reconstruction of the argentavis majestic
Scientific classification
Domain:Eukaryotes
Kingdom:Animals
Kingdom :Eumetazoi
No rank :Bilateral symmetrical
No rank :Secondary
Type of:Chordate
Subtype :Vertebrates
Infratype :Maxillary
Overclass :Tetrapods
Grade:Birds
Subclass :Real birds
Infraclass :Newborn
Squad:Hawk-like
Family:† Teratornithidae
Gender:† Argentavis Campbell & Tonni, 1980
View:† Argentavis
International scientific name

Argentavis magnificens
Campbell & Tonni , 1980

Geochronology
8-5 million years
million yearsEraF-dEra
ThTO
but
th
n
about
s
about
th
2,588
5.33PlioceneN
e
about
g
e
n
23.03Miocene
33.9OligoceneP
but
l
e
about
g
e
n
55.8Eocene
65.5Paleocene
251Mesozoic
◄
Nowadays
◄
Cretaceous-Paleogene extinction

Content

Description

Argentavis was considered the largest known flying bird in the history of the Earth. In 2014, a new species of pelagornis with similar dimensions was described - Pelagornis sandersi [1] [2] . Prior to argentavis, the largest flying birds were considered sea-toothed birds from the Pelagornithidae family, reaching a wingspan of 7 m.

Argentavis lived 5-8 million years ago on the territory of modern Argentina. It weighed about 70 kg [3] , had a height of 1.26 m [3] , its wingspan reached 6.9 m [3] (which is twice the wingspan of the largest modern birds - albatrosses ). The skull of the argentavis was 45 cm long, and the humerus was more than half a meter in length. The duration of molting is estimated at 2.5 months [4] [5] . Argentavis was anatomically close to the ancient storks. According to the structure of the skull of teratornitids, it is concluded that they were not scavengers , but ate live prey, although not very large, which was swallowed whole. It is assumed that they found a large group of rodents, fell upon them from above, stunning them with their bodies, and swallowed - this method of hunting was the reason for gigantism.

The size and structural features of the wings indicate that the bird used mainly the planning flight, possibly using the ascending currents of warm air. Experts estimate the flight speed of at least 40 km / h [6] , presumably about 67 km / h [7] .

Related Species

  • Aiolornis - wingspan - 5 meters.
  • Teratornis - wingspan - less than 4 meters, weight - 15 kg

Notes

  1. ↑ Alexander Telishev. Cenozoic winged flagship (neopr.) (Inaccessible link) . Russian planet (July 8, 2014). Date of treatment July 8, 2014. Archived July 14, 2014.
  2. ↑ Daniel T. Ksepka. Flight performance of the largest volant bird (Eng.) // Proceedings of the National Academy of Sciences . - 2014 .-- ISSN 1091-6490 . - DOI : 10.1073 / pnas.1320297111 . - PMID 25002475 .
  3. ↑ 1 2 3 Sankar Chatterjee, R. Jack Templin, Kenneth E. Campbell, Jr. The aerodynamics of Argentavis , the world's largest flying bird from the Miocene of Argentina // Proceedings of the National Academy of Sciences . - 2007. - Vol. 104, no. 30 . - P. 12398-12403. - ISSN 0027-8424 . - DOI : 10.1073 / pnas.0702040104 . - PMID 17609382 .
  4. ↑ Biologists have identified the growth restriction of large birds (neopr.) . Membrana (June 19, 2009). Date of treatment July 8, 2014. Archived March 11, 2012.
  5. ↑ Sievert Rohwer, Robert E. Ricklefs, Vanya G. Rohwer, Michelle M. Copple. Allometry of the Duration of Flight Feather Molt in Birds // PLOS Biology . - 2009. - Vol. 7, no. 6 . - P. e1000132. - ISSN 1545-7885 . - DOI : 10.1371 / journal.pbio.1000132 .
  6. ↑ Vizcaíno et al., 2000 .
  7. ↑ Chatterjee et al., 2007 .

Literature

  • Chatterjee, Sankar; Templin, R. Jack; Campbell, Kenneth E. The aerodynamics of Argentavis, the world's largest flying bird from the Miocene of Argentina // Proceedings of the National Academy of Sciences of the United States of America . - 2007. - Vol. 104 , no. 30 . - P. 12398-12403 . - DOI : 10.1073 / pnas.0702040104 .
  • Swansong for a superbird (Eng.) // New Scientist . - 1980. - Vol. 87, no. 1220 . - P. 912. - ISSN 0028-6664 .
  • Vizcaíno, Sergio F .; Palmqvist, Paul; Fariña, Richard A. ¿Hay un límite para el tamaño corporal en las aves voladoras? (English) // Encuentros en la Biología. - 2000. - Vol. 64 .
Source - https://ru.wikipedia.org/w/index.php?title=Argentavis&oldid=101332880


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