Micrastur buckleyi

Life-forms

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
Cladus: 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: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Cladus: Neoaves
Cladus: Telluraves
Cladus: Australaves
Ordo: Falconiformes

Familia: Falconidae
Subfamilia: Herpetotherinae
Genus: Micrastur
Species: Micrastur buckleyi
Name

Micrastur buckleyi Swann, 1919
Synonyms

Micrastur melanoleucus buckleyi Swann, 1919: 15 (protonym)

References

Swann, H.K. 1919–1920. A synoptical list of the Accipitres (diurnal birds of prey) : comprising species and subspecies, described up to 1919, with their characters and distribution. London, J. Wheldon. BHL Reference page.
Trailor, M.A., 1948. New birds from Peru and Ecuador. Fieldian Zoology 31 (24) 1948 p. 199 BHL

Links

IUCN: Micrastur buckleyi (Least Concern)

Vernacular names
العربية: صقر غابات باكلي
català: Falcó selvàtic de Buckley
čeština: Sokolec obojkový
English: Buckley's Forest-Falcon
Esperanto: Baklia mikrasturo
français: Carnifex de Buckley
magyar: Perui erdeisólyom
Nederlands: Traylors bosvalk
português: Falcão-de-buckley
svenska: buckleyskogsfalk

Buckley's forest falcon (Micrastur buckleyi), also called lesser collared forest-falcon and Traylor's forest-falcon[3], is a species of bird of prey in subfamily Herpetotherinae of family Falconidae, the falcons and caracaras.[4] It is found in Bolivia, Brazil, Ecuador, Peru, and possibly Colombia and Venezuela.[5]
Taxonomy and systematics

Buckley's forest falcon was previously considered to be a variant of the collared forest falcon (M. semitorquatus). The two of them and the slaty-backed forest falcon (M. mirandollei) are sister species.[6] It is monotypic.[4]
Description

Buckley's forest falcon is 41 to 51 cm (16 to 20 in) long. Its wingspan is 61 to 72 cm (24 to 28 in). Adult males have black upperparts with a white collar. Their cheeks, throat, and underparts are white and unmarked. Their tail is black with three narrow white bars on the inner feathers and four on the outer ones. Their iris is dark brown, their cere, lores, and bare skin around the eye are dull greenish, and their legs and feet are yellowish. Adult females are like males with the addition of white spots on their scapulars and secondaries. Juveniles are also black above but have a buffy breast and dark bars on the belly.[7][8]
Distribution and habitat

Buckley's forest falcon is known from only a few specimens, photographs, and sightings. It has been documented in Bolivia, extreme western Brazil, eastern Ecuador, and eastern Peru. A few sight records in Colombia and Venezuela lead the South American Classification Committee of the American Ornithological Society to classify it as hypothetical in those two countries.[7][5] Most of the records are from lowland tropical and subtropical forest at elevations between 100 and 700 m (300 and 2,300 ft) but one specimen was collected at 1,800 m (5,900 ft) in Ecuador and there is a record at 1,350 m (4,400 ft) in Peru.[7][8]
Behavior
Movement

Buckley's forest falcon is assumed to be a year-round resident.[8]
Feeding

Almost nothing is known about the diet or hunting technique of Buckley's forest falcon. One specimen had a small Mesomys arboreal rat in its stomach. The species' small feet suggest that birds are only a minor part of its diet.[7]
Breeding

Sightings of Buckley's forest falcon fledglings suggest that its breeding season includes April to early August. Nothing else is known about its breeding biology though it is assumed to nest in tree cavities like other Micrastur forest falcons.[7][8]

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

Songs and calls
Listen to Buckley's forest falcon on xeno-canto
Vocalization

The most common Buckley's forest falcon vocalization is "a far-carrying, nasal "eeok, oow" or "eeok, oow...ow", repeated...for long periods, mainly at dawn." It also occasionally makes "a long rising series of "kaw" notes followed by 2-3 falling "aauw" notes".[8]
Status

The IUCN has assessed Buckley's forest falcon as being of Least Concern, though it has a limited range and an unknown population size that is believed to be decreasing. No immediate threats have been identified.[1] It is poorly known and considered to be rare. "Evidence suggest that species is not immediately threatened; however, at least in part of range, habitat is in process of being cleared."[8]
References

BirdLife International (2016). "Buckley's Forest-falcon Micrastur buckleyi". IUCN Red List of Threatened Species. 2016: e.T22696296A93554272. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696296A93554272.en. Retrieved 12 February 2023.
"Appendices | CITES". cites.org. Retrieved February 11, 2023.
"Species account: Buckley's Forest Falcon Micrastur buckleyi". Global Raptor Information Network. The Peregrine Fund. 2011. Retrieved February 12, 2023.
Gill, F.; Donsker, D.; Rasmussen, P., eds. (January 2023). "Seriemas, falcons". IOC World Bird List. v 13.1. Retrieved February 11, 2023.
Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 28 September 2023. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved October 20, 2023
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 30 January 2023. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved January 30, 2023
Ferguson-Lees, James; Christie, David A. (2001). Raptors of the World. New York: Houghton Mifflin. pp. 822–823. ISBN 0-618-12762-3.
Bierregaard, R. O., P. F. D. Boesman, and J. S. Marks (2020). Buckley's Forest-Falcon (Micrastur buckleyi), 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.buffal1.01 retrieved February 12, 2023