The ashy-headed goose (Chloephaga poliocephala) is a species of waterfowl in tribe Tadornini of subfamily Anserinae. It is found in Argentina and Chile.[2][3]
The ashy-headed goose is 50 to 60 cm (20 to 24 in) long. Males weigh 1.62 to 2.27 kg (3.6 to 5.0 lb) and females 1.47 to 1.49 kg (3.2 to 3.3 lb). Adults have the same plumage. Their heads and necks are gray, their upper back and breast chestnut with fine barring, their flanks barred black and white, and their belly white. In flight their blackish wings show bold white leading and trailing patches and a metallic green speculum. Their bill is black and the legs and feet orange with black markings. Juveniles' rufous areas are much duller, their back and breast barring stronger, and their speculum dark brownish.[4]
Distribution and habitatedit
The ashy-headed goose is a bird of South America's southern cone from central Chile and Buenos Aires Province, Argentina, south into Tierra del Fuego. It also occurs as vagrant on the Falkland Islands and has bred there. In summer it primarily inhabits clearings in damp forests of southern beech (Nothofagus sp.) around lakes and marshes, on inland islands, near the coast, and on higher ground. In winter it favors meadows and pastures.[4][5]
Behavioredit
Movementedit
The ashy-headed goose nests south of 37° south latitude in Chile and western Argentina. In winter much of the population moves further north in Chile and onto the Argentinian Pampas.[4]
Feedingedit
The ashy-headed goose is almost entirely vegetarian. A study of its diet on its wintering grounds in Argentina showed it feeding mainly in harvested fields of wheat, maize, sunflower, and sorghum. One in the austral summer in Tierra del Fuego showed a diet there of leaves and fleshy fruits. Red crowberry (Empetrum rubrum) was the dominant fruit.[4]
Breedingedit
The ashy-headed goose's breeding season begins in October to November and in some areas lasts to March. It nests singly or in small loose groups. Nests are placed in a tree hollow, on a stump, or in long grass, and are lined with down. The clutch size is four to six eggs. Males guard females during the incubation period of about 30 days. The time to fledging is not known.[4]
Songs and calls
Listen to ashy-headed goose on xeno-canto
Vocalizationedit
Male and female ashy-headed geese have different vocalizations: Males make "soft, wigeon-like whistles" and females "harsh cackling notes".[4]
Statusedit
The IUCN has assessed the ashy-headed goose as being of Least Concern. It has a large range, and though its population size is unknown it is believed to be stable. No immediate threats have been identified.[1] Winter surveys in northeastern Argentina estimated that as many as 150,000 may be there.[6] The species is "[r]elatively free from human persecution at [the] breeding grounds" but in winter is persecuted by farmers who view it as a competitor to their livestock.[4]
^ abBirdLife International (2016). "Ashy-headed Goose Chloephaga poliocephala". IUCN Red List of Threatened Species. 2016: e.T22679981A92837255. doi:10.2305/IUCN.UK.2016-3.RLTS.T22679981A92837255.en. Retrieved 29 September 2022.
^ abGill, F.; Donsker, D.; Rasmussen, P., eds. (August 2022). "Screamers, ducks, geese, swans". IOC World Bird List. v 12.2. Retrieved August 9, 2022.
^ abcdefgCarboneras, C. and G. M. Kirwan (2020). Ashy-headed Goose (Chloephaga poliocephala), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.ashgoo1.01 retrieved September 29, 2022
^Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022
^Pedrana, J., Bernad, L., Bernardos, J.N., Seco Pon, J.P., Isacch, J.P., Muñóz, S.D. and Maceira, N.O. (2018). Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina. Waterbirds. 41(1): 16–21.
Further readingedit
Wikimedia Commons has media related to Chloephaga poliocephala.
Wikispecies has information related to Chloephaga poliocephala.
Madge, Steve; Burn, Hilary (1988). Waterfowl: an Identification Guide to the Ducks, Geese, and Swans of the World. Boston: Houghton Mifflin. ISBN0-395-46727-6.
January 05, 2024
ashy, headed, goose, ashy, headed, goose, chloephaga, poliocephala, species, waterfowl, tribe, tadornini, subfamily, anserinae, found, argentina, chile, adult, patagonia, south, americaconservation, statusleast, concern, iucn, scientific, classificationdomain,. The ashy headed goose Chloephaga poliocephala is a species of waterfowl in tribe Tadornini of subfamily Anserinae It is found in Argentina and Chile 2 3 Ashy headed gooseAdult in Patagonia South AmericaConservation statusLeast Concern IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass AvesOrder AnseriformesFamily AnatidaeGenus ChloephagaSpecies C poliocephalaBinomial nameChloephaga poliocephalaP L Sclater 1857 Contents 1 Taxonomy and systematics 2 Description 3 Distribution and habitat 4 Behavior 4 1 Movement 4 2 Feeding 4 3 Breeding 4 4 Vocalization 5 Status 6 Gallery 7 References 8 Further readingTaxonomy and systematics editThe ashy headed goose is monotypic 2 Description editThe ashy headed goose is 50 to 60 cm 20 to 24 in long Males weigh 1 62 to 2 27 kg 3 6 to 5 0 lb and females 1 47 to 1 49 kg 3 2 to 3 3 lb Adults have the same plumage Their heads and necks are gray their upper back and breast chestnut with fine barring their flanks barred black and white and their belly white In flight their blackish wings show bold white leading and trailing patches and a metallic green speculum Their bill is black and the legs and feet orange with black markings Juveniles rufous areas are much duller their back and breast barring stronger and their speculum dark brownish 4 Distribution and habitat editThe ashy headed goose is a bird of South America s southern cone from central Chile and Buenos Aires Province Argentina south into Tierra del Fuego It also occurs as vagrant on the Falkland Islands and has bred there In summer it primarily inhabits clearings in damp forests of southern beech Nothofagus sp around lakes and marshes on inland islands near the coast and on higher ground In winter it favors meadows and pastures 4 5 Behavior editMovement edit The ashy headed goose nests south of 37 south latitude in Chile and western Argentina In winter much of the population moves further north in Chile and onto the Argentinian Pampas 4 Feeding edit The ashy headed goose is almost entirely vegetarian A study of its diet on its wintering grounds in Argentina showed it feeding mainly in harvested fields of wheat maize sunflower and sorghum One in the austral summer in Tierra del Fuego showed a diet there of leaves and fleshy fruits Red crowberry Empetrum rubrum was the dominant fruit 4 Breeding edit The ashy headed goose s breeding season begins in October to November and in some areas lasts to March It nests singly or in small loose groups Nests are placed in a tree hollow on a stump or in long grass and are lined with down The clutch size is four to six eggs Males guard females during the incubation period of about 30 days The time to fledging is not known 4 nbsp Songs and callsListen to ashy headed goose on xeno canto Vocalization edit Male and female ashy headed geese have different vocalizations Males make soft wigeon like whistles and females harsh cackling notes 4 Status editThe IUCN has assessed the ashy headed goose as being of Least Concern It has a large range and though its population size is unknown it is believed to be stable No immediate threats have been identified 1 Winter surveys in northeastern Argentina estimated that as many as 150 000 may be there 6 The species is r elatively free from human persecution at the breeding grounds but in winter is persecuted by farmers who view it as a competitor to their livestock 4 Gallery edit nbsp Parents with chicks in Tierra del Fuego nbsp Juveniles in Patagonia nbsp Chloephaga poliocephala egg MHNTReferences edit a b BirdLife International 2016 Ashy headed Goose Chloephaga poliocephala IUCN Red List of Threatened Species 2016 e T22679981A92837255 doi 10 2305 IUCN UK 2016 3 RLTS T22679981A92837255 en Retrieved 29 September 2022 a b Gill F Donsker D Rasmussen P eds August 2022 Screamers ducks geese swans IOC World Bird List v 12 2 Retrieved August 9 2022 HBW and BirdLife International 2021 Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world Version 6 Available at http datazone birdlife org userfiles file Species Taxonomy HBW BirdLife Checklist v6 Dec21 zip retrieved August 7 2022 a b c d e f g Carboneras C and G M Kirwan 2020 Ashy headed Goose Chloephaga poliocephala version 1 0 In Birds of the World J del Hoyo A Elliott J Sargatal D A Christie and E de Juana Editors Cornell Lab of Ornithology Ithaca NY USA https doi org 10 2173 bow ashgoo1 01 retrieved September 29 2022 Remsen J V Jr J I Areta E Bonaccorso S Claramunt A Jaramillo D F Lane J F Pacheco M B Robbins F G Stiles and K J Zimmer Version 24 July 2022 Species Lists of Birds for South American Countries and Territories https www museum lsu edu Remsen SACCCountryLists htm retrieved July 24 2022 Pedrana J Bernad L Bernardos J N Seco Pon J P Isacch J P Munoz S D and Maceira N O 2018 Winter population size estimations of three migratory sheldgeese in the southern pampas Argentina Waterbirds 41 1 16 21 Further reading edit nbsp Wikimedia Commons has media related to Chloephaga poliocephala nbsp Wikispecies has information related to Chloephaga poliocephala Madge Steve Burn Hilary 1988 Waterfowl an Identification Guide to the Ducks Geese and Swans of the World Boston Houghton Mifflin ISBN 0 395 46727 6 Retrieved from https en wikipedia org w index php title Ashy headed goose amp oldid 1190986544, wikipedia, wiki, book, books, library,
