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Notharchus swainsoni - Buff-bellied puffbird

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Ordo: Piciformes

Familia: Bucconidae
Genus: Notharchus
Species: Notharchus swainsoni
Name

Notharchus swainsoni (G.R. Gray, 1846)
References

The Genera of Birds 1 p.[74]
Vernacular names
English: Buff-bellied Puffbird
español: Chacuru grande; buco de Swainson
português: Macuru-de-barriga-castanha

The buff-bellied puffbird (Notharchus swainsoni) is a species of bird in the family Bucconidae, the puffbirds, nunlets, and nunbirds. It is found in Argentina, Brazil, and Paraguay.[2]

Taxonomy and systematics

During the second half of the twentieth century, the buff-bellied puffbird and what are now the white-necked puffbird (N. hyperrhynchus) and Guianan puffbird (N. macrorhynchus) were treated as conspecific. It is now treated as its own monotypic species.[3][4][2]
Description

The buff-bellied puffbird is about 23.5 cm (9.3 in) long and weighs 72 to 75.6 g (2.5 to 2.7 oz). The crown and upperparts are black with a green gloss and buffy edges to the feathers. It has a narrow white forehead, throat, and upper breast. The sides of the face and a thin band around the nape are grayish white. A wide black band separates the upper breast from the buffy to pale rufous belly. The flanks are gray. Its eye color can be straw, brown, or red.[4]
Distribution and habitat

The buff-bellied puffbird is found in eastern Paraguay, far northeastern Argentina's Misiones Province, and in southeastern Brazil from southern Bahia and Espírito Santo south to Santa Catarina. It is resident in Argentina but possibly moves from other parts of its range into São Paulo state in the austral summer. It inhabits lowland humid primary and secondary forest.[4]
Behavior
Feeding

The buff-bellied puffbird hunts by sallies from a high bare perch to capture insects and sometimes small vertebrates; it also eats some fruits. It investigates army ant swarms.[4]
Breeding

The buff-bellied puffbird breeds in September and October in the southern part of its range; the season elsewhere is not known. It excavates a nest cavity in an arboreal termitarium, and all other known breeding phenology at least for the Paraguayan subspecies is limited to one research paper<ref>https://link.springer.com/article/10.1007/BF03544372<ref>.

Dickcissel male perched on a metal pole singing, with neck stretched and beak open.

Songs and calls
Listen to buff-bellied puffbird on xeno-canto
Vocalization

The buff-bellied puffbird's song is a "descending sequence of whistles, varying in rhythm, 'ui-ui---dibule-dibule...'."[4]
Status

The IUCN has assessed the buff-bellied puffbird as being of Least Concern. It has a reasonably large range, and though its population has not been quantified it is believed to be stable.[1] It has apparently expanded its range in Brazil since about 2000 and occurs in several protected areas.[4]
References

BirdLife International (2016). "Buff-bellied Puffbird Notharchus swainsoni". IUCN Red List of Threatened Species. 2016. Retrieved 30 October 2021.
Gill, F.; Donsker, D.; Rasmussen, P. (July 2021). "IOC World Bird List (v 11.2)". Retrieved July 14, 2021.
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 August 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved August 24, 2021
Rasmussen, P. C., N. Collar, and G. M. Kirwan (2020). Buff-bellied Puffbird (Notharchus swainsoni'), 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.bubpuf1.01 retrieved October 30, 2021

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