Micrastur ruficollis

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
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
Cladus: Telluraves
Cladus: Australaves
Ordo: Falconiformes

Familia: Falconidae
Subfamilia: Herpetotherinae
Genus: Micrastur
Species: Micrastur ruficollis
Subspecies: M. r. concentricus – M. r. guerilla – M. r. interstes – M. r. olrogi – M. r. pelzelni – M. r. ruficollis – M. r. zonothorax
Name

Micrastur ruficollis (Vieillot, 1817)
Synonyms

Sparvius ruficollis (protonym)

References

Vieillot, L.J.P. 1817. Nouveau Dictionnaire d’Histoire naturelle, appliquée aux arts, à l'agriculture, à l'économie rurale et domestique, à la médecine, etc. Par une société de naturalistes et d'agriculteurs. Avec des figures tirées des trois règnes de la nature. Tome 10. 591 pp. + 5 tt. Déterville, Paris. p. 322 BHL Reference page.

Vernacular names
čeština: Sokolec pralesní
English: Barred Forest-falcon
español: Halcón montés agavilanado
Nederlands: Gestreepte bosvalk
português: Falcão-mateiro-de-peito-ruivo

The barred forest falcon (Micrastur ruficollis) is a species of bird of prey in the family Falconidae which includes the falcons, caracaras, and their relatives. It occurs throughout most of tropical and subtropical Latin America, except the arid Pacific coast in South America, northern and western Mexico, and the Antilles.

Description

Adults of most subspecies are typically dark slate grey above; the tail is tipped with white and has three to six narrow white bars.[2] The throat is pale grey, shading to the darker slate of the crown. The rest of the under parts, including the under-wing coverts, are white, finely and clearly barred with black or dark grey. The upper breast is a darker grey. The primary remiges are dark brownish-grey with off-white bars on the inner webs. One subspecies, M. r. zonothorax from the East Andean foothills, is polymorphic (at least in the northern part of its range), and also occurs in a brown morph, where most of the upperparts, head, and chest are brown or rufous instead of grey.[3] The nominate subspecies, which is found from southeastern Brazil south to northeastern Argentina and west to Paraguay, appears to only occur in the rufous-brown morphotype, as also suggested by its scientific name, M. r. ruficollis.

The eyes are cream to light orange brown; the bill black, becoming yellow at base of the lower mandible; the cere, lores, and orbit are yellow, and the legs are orange-yellow.
Ecology

Barred forest falcons mainly use mature upland forest. In Central America, the species is generally restricted to mature tropical forest. In South America, however, the barred forest falcon lives in other kinds of forest and woodland, even relatively arid. For example, in the Amazon biome it occurs most often in secondary forest, gallery forest, tidal swamp forest, semideciduous forest, and forest edges. In Acre, Brazil, the barred forest falcon is reported to prefer disturbed forest types, both natural secondary and man made, including bamboo and more open seasonally drier forest on rocky outcrops, but generally it is a bird that avoids habitat where human influence is too pronounced, and requires primary or mature secondary forest to persist in any location.[4] It is not commonly seen, but based on voice, it appears to be uncommon to fairly common throughout a large part of its range. This, combined with its large range, has led to it being classified as a species of Least Concern by the IUCN.[5]

It is rare on the eastern slope of the Colombian Cordillera Oriental, where it was recorded in primary forest and old secondary forest, in a narrow altitude band between 3,300 and 4,900 ft (1,000-1,500 m) above mean sea level, and first encountered in the Serranía de las Quinchas only in 2000/2001.[4] Second-growth forest in these mountains is dominated by trees like Melastomaceae (e.g. Miconia and Tibouchina) and trees are generally overgrown with epiphytes and hemiepiphytes like Coussapoa (Urticaceae).[6]

This species feeds primarily upon small birds, mammals (mainly rodents and marsupials such as the Brazilian slender opossum, Marmosops paulensis,[7]) and squamates. Like Accipiter hawks, they often hunt prey by sitting quietly on tree branches and waiting for their victims to appear. When the prey arrives, the forest falcons quickly ambush them, attempting to catch them with a brief, flying pursuit. However, forest falcons also use other techniques to hunt prey, such as chasing prey on foot, following army ant swarms, and acoustical luring of birds, by means of a "facial disc".[8] The species has also been recorded to snatch animals from traps or cages, for example during mark-recapture studies.[7]

Forest falcons do not build a nest, but lay their two or three white eggs in cavities in trees. Laying occurs mainly late in the dry season, with hatching taking place at the onset of the rainy season, a time of increasing prey abundance. Eggs hatch 33–35 days after being laid, and nestlings fledge 35–44 days after hatching. Radio-tagged fledglings dispersed from their parents' territories within four to seven weeks after fledging, presumably achieving independence at that time. Nesting territories were occupied year after year; and high mate fidelity is seen.
Footnotes

BirdLife International (2020). "Micrastur ruficollis". IUCN Red List of Threatened Species. 2020: e.T22696270A140967339. doi:10.2305/IUCN.UK.2020-3.RLTS.T22696270A140967339.en. Retrieved 13 November 2021.
Howell & Webb (1995)
Restall et al. (2006)
Laverde-R. et al. (2005)
BLI (2004)
Salaman et al. (2002)
Olmos et al. (2006)

Whitacre, David F. (2013). Neotropical Birds of Prey: Biology and Ecology of a Forest Raptor Community. Cornell University Press. pp. 235–254. ISBN 9780801466113.

References

Howell, S.N.G.; & Webb, S. (1995): A Guide to the Birds of Mexico and Northern Central America. Oxford University Press, New York. ISBN 0-19-854013-2
Laverde-R., Oscar; Stiles, F. Gary & Múnera-R., Claudia (2005): Nuevos registros e inventario de la avifauna de la Serranía de las Quinchas, un área importante para la conservación de las aves (AICA) en Colombia [New records and updated inventory of the avifauna of the Serranía de las Quinchas, an important bird area (IBA) in Colombia]. Caldasia 27(2): 247-265 [Spanish with English abstract]. PDF fulltext
Olmos, Fábio; Pacheco, José Fernando & Silveira, Luís Fábio (2006): Notas sobre aves de rapina (Cathartidae, Acciptridae e Falconidae) brasileiras [Notes on Brazilian birds of prey]. Revista Brasileira de Ornitologia 14(4): 401-404 [Portuguese with English abstract]. PDF fulltext
Restall, R. L.; Rodner, C. & Lentino, M.. (2006): Birds of Northern South America. Christopher Helm, London. ISBN 0-7136-7243-9 (vol. 1). ISBN 0-7136-7242-0 (vol. 2).
Salaman, Paul G.W.; Stiles, F. Gary; Bohórquez, Clara Isabel; Álvarez-R., Mauricio; Umaña, Ana María; Donegan, Thomas M. & Cuervo, Andrés M. (2002): New and noteworthy bird records from the east slope of the andes of Colombia. Caldasia 24(1): 157–189. PDF fulltext