Vandringsduva
Vandringsduva Status i världen: Utdöd (1914)[1] | |
Systematik | |
---|---|
Domän | Eukaryoter Eukaryota |
Rike | Djur Animalia |
Stam | Ryggsträngsdjur Chordata |
Understam | Ryggradsdjur Vertebrata |
Klass | Fåglar Aves |
Ordning | Duvfåglar Columbiformes |
Familj | Duvor Columbidae |
Släkte | Ectopistes Swainson, 1827 |
Art | Vandringsduva E. migratorius |
Vetenskapligt namn | |
§ † Ectopistes migratorius | |
Auktor | Linné, 1766 |
Utbredning | |
Häckningsområde i rött. Utbredning under vintern i orange. | |
Synonymer | |
Uppstoppad hane. |
Vandringsduva[3] (Ectopistes migratorius) var en nordamerikansk duva som utrotades i början av 1900-talet, genom jakt och habitatförstörelse.
Utbredning och population
Vandringsduvan var en flyttfågel som uppträdde i enorma flockar i östra och centrala Nordamerika. En observation från 1866 i södra Ontario beskriver en flock som var 1,6 km bred, 480 km lång och tog 14 timmar att passera och uppskattningsvis omfattade 3,5 miljarder individer.[4] Om uppskattningen stämmer omfattade flocken förmodligen merparten av den totala populationen vid denna tid.[5][6]
Det finns uppskattningar om att populationen av vandringsduva uppgick till 3-5 miljarder individer när européerna anlände Nordamerika och att den kan ha utgjort 25-40% av USA:s totala fågelpopulation.[6] Det finns dock annan forskning som tyder på att arten inte var så talrik under förcolumbiansk tid, utan att antalet ökade som en direkt följd av indianernas minskning vilket ska ha lett till en ökad födotillgång för duvan.[7]
Populationsminskningen och utrotning
Populationsminskningen berodde delvis på habitatförstörelse i och med att européerna började bosätta sig i inlandet, främst på grund av den avskogning som följde och förändring från prärie till jordbruksbygd. Men den främsta faktorn var att duvkött började säljas som billig mat för slavar och fattiga under 1800-talet vilket ledde till en systematisk jakt i massiv skala. Populationstrenden var långsamt dalande under perioden 1800 till 1870, med en dramatisk minskning mellan 1870 och 1890.[8]
Mytbildningen kring duvan spred sig över världen. 1906, bara några år innan arten helt utrotats, publicerade ornitologen Reinhold Winter sin bok Fågelkåserier av Regulus där han skriver:
” | Det är en ren olycka för en kulturort att till granne få en dylik dufstat, ty djuren sluka allt ätbart i nejden, och då det är slut där, ge de sig af på långfärder många mil, i skaror, som förmörkar solen. På en halftimma kunna stora, rika fält vara utplundrade och ägarna ruinerade. Människorna hämna sig dock. Innan ungarna blifvit flygfärdiga, bege de sig in i kolonierna, hugga ned träden och taga de späda dufvorna, som de äta färska, röka eller pressa fett af. Med dylika landsplåga kunna blott gräshoppsvärmarna jämställas.[2] | „ |
1909 innehåller ett mötesprotokoll från American Ornithologists' Union (AOU) en punkt om huruvida vandringsduvan kanske är utrotad i det vilda och en utlysning om en belöning på $1200 för den som kan lägga fram bevis för en konstaterad häckning.[9] Vandringsduvan Martha, som levde i fångenskap på Cincinnati Zoo, tros ha varit världens sista av sin art och hon dog 1 september 1914.[10]
Noter
- ^ Birdlife International 2016 Ectopistes migratorius Från: IUCN 2016. IUCN Red List of Threatened Species. Version 2016.3 www.iucnredlist.org. Läst 10 december 2016.
- ^ [a b] Reinhold Winter (1906) 'Fågelkåserier av Regulus, Beijers Bokförlagsaktiebolag, Stockholm, sid:139
- ^ Sveriges ornitologiska förening (2017) Officiella listan över svenska namn på världens fågelarter, läst 2017-02-14
- ^ Ehrlich, Paul R.; Dobkin, David S. (1988). ”The Passenger Pigeon”. Stanford University. http://www.stanford.edu/group/stanfordbirds/text/essays/Passenger_Pigeon.html. Läst 3 mars 2012.
- ^ Sullivan, Jerry; Sutton, Bobby (Illustrator); Cronon, William (Foreword) (April 2004). ”The Passenger Pigeon: Once There Were Billions”. Hunting for Frogs on Elston, and Other Tales from Field & Street (Chicago, IL: University of Chicago Press): sid. 210-113. ISBN 978-0-226-77993-5. http://www.press.uchicago.edu/Misc/Chicago/779939pass.html. Läst 29 februari 2012.
- ^ [a b] ”The Passenger Pigeon”. Encyclopedia Smithsonian. Smithsonian Institution. 30 mars 2024. Arkiverad från originalet den 13 mars 2012. https://www.webcitation.org/668YbBuKk?url=http://www.si.edu/Encyclopedia_SI/nmnh/passpig.htm. Läst 28 februari 2012.
- ^ Mann, Charles C. (2005). ”The Artificial Wilderness”. 1491: New Revelations of the Americas Before Columbus. New York: Alfred A. Knopf. sid. 315–318. ISBN 1-4000-4006-X
- ^ ”Passenger Pigeon Timeline” (pdf). Science NetLinks. 21 juli 2011. Arkiverad från originalet den 21 juli 2011. https://web.archive.org/web/20110721113905/http://www.sciencenetlinks.com/pdfs/pigeons1_actsheet.pdf. Läst 29 februari 2012. med Wayback machine
- ^ Stukel, Eileen Dowd. ”Passenger Pigeon”. South Dakota Game Fish & Parks. http://gfp.sd.gov/wildlife/critters/birds/passenger-pigeon.aspx. Läst 2 mars 2012.
- ^ Sista paret ut, sid:77-78, ISBN 951-99988-9-6
Externa länkar
- Wikimedia Commons har media som rör vandringsduva.
Media som används på denna webbplats
Identifier: birdlore151913nati (find matches)
Title: Bird lore
Year: 1899 (1890s)
Authors: National Committee of the Audubon Societies of America National Association of Audubon Societies for the Protection of Wild Birds and Animals National Audubon Society
Subjects: Birds Birds Ornithology
Publisher: New York City : Macmillan Co.
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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About This Book: Catalog Entry
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Text Appearing Before Image:
nce an actual study of the Passenger Pigeon in the field is no longerpossible, information concerning its distribution and habits must be soughtfor in the records of former generations, and obtained from those yet livingwho knew the bird in its prime. Imperfect as this material is and difficult toprocure, the recent revival of interest in its tragic fate has brought to lightsufficient data to trace the life history of the race, and to fathom the causeswhich brought about its sudden and mysterious disappearance from the worldof the living. The habitat of the Pigeon, embracing as it did the vast native forest ofeastern North America, offered the bird a choice of food and residence, definiteregions thereof being occupied in proper season and in regular rotation. Eventhe fruits of the lowly herbs contributed to its bill of fare, and the handsomepoke-weed is locally known as Pigeon berry at the present day. But thebulk of its food consisted of the acorns of the numerous species of oak, the
Text Appearing After Image:
PASSENGER PIGEON, ADULT FEMALENote the characteristically erect pose (79) 80 Bird - Lore seeds of beech, chestnut, maple, elm, and other hardwoods, of pine and hem-lock, and of the fruits and berries of bushes and shrubs. Angleworms, snails,caterpillars, and soft-bodied insects, such as grasshoppers, helped to vary thevegetarian diet. From the frequent mineral springs and licks the bird grati-fied its craving for salt, a condiment eagerly sought by all grain feeders. The winter range of the bird comprised the territory south of Mason andDixons line, a land well stocked with its chief food supply during the inclementseasons. In one of these natural granaries the flocks would settle down andforage until the mast within a radius of two hundred miles and over had beenconsumed. While feeding in concert, the rear ranks successively rose and,passing over the whole flock, alighted in front, giving every bird an equalchance. Like an enormous wheel in slow motion, the birds moved through thewoo
Note About Images
Photograph of a female Passenger Pigeon (Ectopistes migratorius) in captivity from the year 1898.
Författare/Upphovsman: Valérie Chansigaud, Licens: CC BY-SA 1.0
Former range of the now extinct Passenger Pigeon (E. migratorius)
Författare/Upphovsman: James St. John, Licens: CC BY 2.0
Ectopistes migratorius (Linnaeus, 1766) - passenger pigeon (extinct) (mount, public display, Field Museum of Natural History, Chicago, Ilinois, USA).
The story of the passenger pigeon is famous as an example of the idiotic destructive power of modern man ("Homo stupidus") & human overpopulation. The passenger pigeon, Ectopistes migratorius, was at one time the # 1 most abundant bird in North America, and likely the # 1 most abundant bird on Earth. The species became extinct about 100 years ago. The last known individual was a captive bird held at the Cincinnati Zoo. It died at 1 PM on 1 September 1914. It is the only species whose extinction timing is very well known. Ectopistes migratorius occupied the central & eastern portions of temperate North America. It was driven to extinction by professional hunters (the birds were destined for food markets - American Indians also killed these birds as a source of food) and clear-cutting of forests. Passenger pigeon flocks were famously huge - they darkened skies and took hours to fly by. Their droppings fell like snow. Individual flocks were estimated to have contained more than three billion birds. Flock density was so high that when two flocks flying in opposite directions collided, numerous stunned birds fell to the ground.
Passenger pigeons nested in huge colonies, occupying hundreds of square miles of forests. Single trees could have hundreds of nests. Tree branches were seen to break from the weight of all the perching birds. Late 1800s hunters targeted the nesting colony areas. Oddly, passenger pigeons couldn’t nest alone or in small colonies. With the destruction of the nesting colonies, the species couldn’t make a comeback. The passenger pigeon is the only species in the pigeon/dove family driven to extinction by gun nerds. However, several other birds in this family, usually island species, have gone also extinct due to other human factors.
The Lesson? Natural resources can run out. (think oil as well)
Classification: Animalia, Chordata, Vertebrata, Aves, Columbiformes, Columbidae
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.Captive Passenger Pigeon.