Accipiter

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Accipiter
Collared Sparrowhawk kobble08.JPG
Collared sparrowhawk, Kobble Creek (Queensland, Australia)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Subfamily: Accipitrinae
Genus: Accipiter
Brisson, 1760
Synonyms

Hieraspiza Kaup, 1844 (but see text)

Accipiter is a genus of birds of prey in the family Accipitridae. With 51 recognized species it is the most diverse genus in its family. Most species are called goshawks or sparrowhawks, although almost all New World species (excepting the northern goshawk) are simply known as hawks. They can be anatomically distinguished from their relatives by the lack of a procoracoid foramen. Two small and aberrant species usually placed here do possess a large procoracoid foramen and are also distinct as regards DNA sequence. They may warrant separation in the old genus Hieraspiza.[1]

Extant accipiters range in size from the little sparrowhawk (A. minullus), in which the smallest males measure 20 cm (7.9 in) long, span 39 cm (15 in) across the wings and weigh 68 g (2.4 oz), to the northern goshawk (A. gentilis), in which the largest females measure 64 cm (25 in) long, span 127 cm (50 in) across the wings, and weigh 2.2 kg (4.9 lb).[2] These birds are slender with short, broad, rounded wings and a long tail which helps them maneuver in flight. They have long legs and long, sharp talons used to kill their prey, and a sharp, hooked bill used in feeding. Females tend to be larger than males. They often ambush their prey, mainly small birds and mammals, capturing them after a short chase. The typical flight pattern is a series of flaps followed by a short glide. They are commonly found in wooded or shrubby areas.

The genus Accipiter was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the Eurasian sparrowhawk (Accipiter nisus) as the type species.[3][4] The name is Latin for "hawk", from accipere, "to grasp".[5]

Procoracoid foramen[edit]

The procoracoid foramen (or coracoid foramen, coracoid fenestra) is a hole through the process at the front of the coracoid bone, which accommodates the supracoracoideus nerve. In some groups of birds it may be present as a notch, or incisura; or the notch may be partially or weakly closed with bone. In other groups the feature is completely absent.

The foramen is generally present in birds of prey, but it is absent in most Accipiter hawks that have been studied. This absence is proposed as a diagnostic feature.

A study of accipitrid skeletons found procoracoid incisurae (as opposed to foramina) in some specimens of the eagles Aquila gurneyi and A. chrysaetos, but not in four other Aquila species. The notch was variably open or weakly ossified in Spizastur melanoleucos, Lophoaetus occipitalis, Spizaetus ornatus, and Stephanoaetus coronatus. Also the buteonine hawks Buteo brachyurus and B. hemilasius had incisurae, differing from 17 other Buteo species.[6]

In Circus the foramen was found to be variable, not only within species but even between sides in the same individual. It is usually open or absent but may be closed by "a thread of bone". Research in genetic phylogeny has since indicated that Circus is closely related to Accipiter.

The notch was also absent or indistinct in Harpagus bidentatus.

Urotriorchis macrourus has a well-developed procoracoid foramen, which suggests a separation from Accipiter. It may be related to the chanting goshawks in tribe Melieraxini.[7]

Genetic phylogeny[edit]

Analysis of molecular genetics indicates that Accipiter is paraphyletic to the Circus harriers, even though the two groups differ in hunting habits and body shape.[8] There are three or four clades of Accipiter, with Circus, Megatriorchis and Erythrotriorchis intermixed.

John Boyd proposes splitting Accipiter into four separate genera: Aerospiza, Tachyspiza, Accipiter, and Astur.[9] In this scheme Tachyspiza has the most species, and a reduced Accipiter would have only six: Eurasian sparrowhawk (A. nisus, type species), rufous-breasted sparrowhawk (A. rufiventris), sharp-shinned hawk (A. striatus), white-breasted hawk (A. chionogaster), plain-breasted hawk (A. ventralis), rufous-thighed hawk (A. erythronemius).

List of Accipiter species[edit]

There are 51 species in the Accipiter genus.[10]

Common name[a] Scientific name [b] IUCN Red List Status Distribution Picture
Status Trend Population[c]
Tiny hawk Accipiter superciliosus
(Linnaeus, 1766)
LC IUCN[11] Decrease 670 - 6,700 Accipiter superciliosus.jpg
Semicollared hawk Accipiter collaris
Sclater, 1860
NT IUCN[12] Steady 1,500 - 7,000 Accipiter collaris 1860.jpg
Crested goshawk Accipiter trivirgatus
(Temminck, 1824)
LC IUCN[13] Decrease Crested Goshawk map.jpg Accipiter trivirgatus PA273291.jpg
Sulawesi goshawk Accipiter griseiceps
(Schlegel, 1862)
LC IUCN[14] Decrease Sulawesi Goshawk map.png AsturGriseicepsWolf.jpg
Grey-bellied hawk Accipiter poliogaster
(Temminck, 1824)
NT IUCN[15] Increase 1,000 - 10,000 Range Map Grey-Bellied Hawk.jpg UrospiziasJardineiKeulemans.jpg
Red-chested goshawk Accipiter toussenelii
(J. Verreaux, E. Verreaux, and Des Murs, 1855)
LC IUCN[16] Decrease AsturMacroscelidesKeulemans.jpg
African goshawk Accipiter tachiro
(Daudin, 1800)
LC IUCN[17] Decrease African Goshawk Range.png African Goshawk RWD2.jpg
Chestnut-flanked sparrowhawk Accipiter castanilius
Bonaparte, 1853
LC IUCN[18] Decrease AccipiterCastaniliusSmit.jpg
Shikra Accipiter badius
Gmelin, 1788
LC IUCN[19] Steady 500,000 - 999,999 AccipiterBadiusIUCNver2018 2.png Shikra1.jpg
Nicobar sparrowhawk Accipiter butleri
(Gurney, 1898)
VU IUCN[20] Decrease 2,500 - 5,000
Levant sparrowhawk Accipiter brevipes
(Severtzov, 1850)
LC IUCN[21] Steady 10,000 - 19,999 AccipiterBrevipesIUCNver2018 2.png Accipiter brevipes 1.jpg
Chinese sparrowhawk Accipiter soloensis
(Horsfield, 1821)
LC IUCN[22] Decrease 100,000 - 499,999 Juvenile Chinese Sparrowhawk in flight.JPG
Frances's sparrowhawk Accipiter francesiae
Smith, 1834
LC IUCN[23] Steady Francess sparrowhawk cropped.jpg
Spot-tailed sparrowhawk Accipiter trinotatus
Bonaparte, 1850
LC IUCN[24] Steady Spot-tailed goshawk - Accipiter trinotatus, Tangkoko lodge, northern Sulawesi, 2011-04-19 (4 of 10) (5834083244).jpg
Grey goshawk Accipiter novaehollandiae
(Gmelin, 1788)
LC IUCN[25] Decrease 2,500 - 9,999 Grey Goshawk Dayboro Apr02.JPG
Variable goshawk Accipiter hiogaster
(PLS Müller, 1841)
LC IUCN[26] Steady Variable Goshawk (8270598950).jpg
Brown goshawk Accipiter fasciatus
(Vigors and Horsfield, 1827)
LC IUCN[27] Decrease Brown Goshawk kur.JPG
Black-mantled goshawk Accipiter melanochlamys
(Salvadori, 1875)
LC IUCN[28] Steady 670 - 6,700 Black-mantled Goshawk, Ambua Lodge, PNG (6089917878).jpg
Pied goshawk Accipiter albogularis
Gray, 1870
LC IUCN[29] Steady 670 - 6,700 UrospiziasAlbogularisKeulemans.jpg
White-bellied goshawk Accipiter haplochrous
Sclater, 1859
NT IUCN[30] Decrease 1,500 - 7,000 Accipiter haplochrous 1859.jpg
Fiji goshawk Accipiter rufitorques
(Peale, 1848)
LC IUCN[31] Steady 670 - 6,700 Fiji goshawk savusavu june 2008.JPG
Moluccan goshawk Accipiter henicogrammus
(G.R. Gray, 1860)
NT IUCN[32] Decrease 2,500 - 9,999
Slaty-mantled goshawk Accipiter luteoschistaceus
Rothschild & Hartert, 1926
VU IUCN[33] Decrease 1,000 - 2,499
Imitator goshawk Accipiter imitator
Hartert, 1926
VU IUCN[34]
Decrease 250 - 999
Grey-headed goshawk Accipiter poliocephalus
(Gray, 1858)
LC IUCN[35] Steady Accipiter poliocephalus 1860.jpg
New Britain goshawk Accipiter princeps
Mayr, 1934
VU IUCN[36] Decrease 2,500 - 9,999
Red-thighed sparrowhawk Accipiter erythropus
(Hartlaub, 1855)
LC IUCN[37] Decrease Accipiter erythropus erythropus Keulemans.jpg
Little sparrowhawk Accipiter minullus
(Daudin, 1800)[38]
LC IUCN[39] Steady Little sparrowhawk (Accipiter minullus) 03.jpg
Japanese sparrowhawk Accipiter gularis
(Temminck & Schlegel, 1844)
LC IUCN[40] Steady 20100710 tumi nagoya 03.jpg
Besra Accipiter virgatus
Temminck, 1822
LC IUCN[41] Decrease 20,000 - 200,000 Besra Range.png Besra Sparrowhawk, Wattegama, Sri Lanka.jpg
Dwarf sparrowhawk Accipiter nanus
(Blasius, 1897)
NT IUCN[42] Decrease Naturalis Biodiversity Center - ZMA.AVES.47471 - Accipiter nanus Blasius, W.H., 1897 - Accipitridae - skin specimen.jpeg
Rufous-necked sparrowhawk Accipiter erythrauchen
Gray, 1861
NT IUCN[43] Decrease 670 - 6,700 FalcoRubricollisWolf.jpg
Collared sparrowhawk Accipiter cirrocephalus
Vieillot, 1817
LC IUCN[44] Decrease Accipiter cirrocephalus - Collared Sparrowhawk.jpg
New Britain sparrowhawk Accipiter brachyurus
Ramsay, 1879
VU IUCN[45] Decrease 1,000 - 2,499
Vinous-breasted sparrowhawk Accipiter rhodogaster
(Schlegel, 1862)
LC IUCN[46] Decrease 670 - 6,700 Accipiter rhodogaster.jpg
Madagascan sparrowhawk Accipiter madagascariensis
Smith, 1834
NT IUCN[47] Decrease 3,300 - 6,700 Madagascar Sparrowhawk - Andasibè - Madagascar S4E7858 (15102515088).jpg
Ovambo sparrowhawk Accipiter ovampensis
Gurney, 1875
LC IUCN[48] Increase AccipiterOvampensisKeulemans.jpg
Eurasian sparrowhawk Accipiter nisus
(Linnaeus, 1758)
LC IUCN[49] Steady 2,200,000 - 3,300,000 AccipiterNisusIUCNver2018 2.png Accnis edit.jpg
Rufous-chested sparrowhawk Accipiter rufiventris
Smith, 1830
LC IUCN[50] Increase Rufous-chested Sparrowhawk (Accipiter rufiventris).jpg
Sharp-shinned hawk Accipiter striatus
Vieillot, 1808
LC IUCN[51] Increase Accipiter striatus map.svg Accipiter striatus, Canet Road, San Luis Obispo 1.jpg
White-breasted hawk Accipiter chionogaster
Kaup, 1852
AccipiterChionogasterSmit.jpg
Plain-breasted hawk Accipiter ventralis
PL Sclater, 1866
Accipiter ventralis 2.jpg
Rufous-thighed hawk Accipiter erythronemius
Kaup, 1850
Accipiter erythronemius Horto Florestal de Sao Paulo, Brazil 1.jpg
Cooper's hawk Accipiter cooperii
(Bonaparte, 1828)
LC IUCN[52] Increase Accipiter cooperii map.svg Accipiter-cooperii-01.jpg
Gundlach's hawk Accipiter gundlachi
Lawrence, 1860
EN IUCN[53] Decrease 700 - 900 Gavilan cubano.jpg
Bicolored hawk Accipiter bicolor
(Vieillot, 1817)
LC IUCN[54] Unknown 20,000 - 49,999 Bicoloured Hawk (Accipiter bicolor) with prey.jpg
Chilean hawk Accipiter chilensis
Philippi & Landbeck, 1864
Peuquito.jpg
Black sparrowhawk Accipiter melanoleucus
Smith, 1830
LC IUCN[55] Decrease Black Goshawk Range.png Black Sparrowhawk white morph 2 x.jpg
Henst's goshawk Accipiter henstii
(Schlegel, 1873)
NT IUCN[56] Decrease 670 - 1,500 Accipiter henstii.jpg
Northern goshawk Accipiter gentilis
(Linnaeus, 1758)
LC IUCN[57] Unknown 1,000,000 - 2,499,999 AccipiterGentilis.png Northern Goshawk ad M2.jpg
Meyer's goshawk Accipiter meyerianus
(Sharpe, 1878)
LC IUCN[58] Decrease 670 - 6,700 John Gerrard Keulemans03.jpg

Extinct species[edit]

Notes[edit]

  1. ^ 51 Accipiter species are listed according to the IOC World Bird List.[10] One species, Lesser Sundas goshawk, which is listed in the IUCN redlist but not the IOC World Bird List is excluded.
  2. ^ A binomial authority in parentheses indicates that the species was originally described in a genus other than Accipiter.
  3. ^ Estimate for the number of mature individuals in the wild.

References[edit]

  1. ^ Olson (2006)
  2. ^ Raptors of the World by Ferguson-Lees, Christie, Franklin, Mead & Burton. Houghton Mifflin (2001), ISBN 0-618-12762-3.
  3. ^ Brisson, Mathurin Jacques (1760). Ornithologie; ou, Méthode contenant la division des oiseaux en ordres, sections, genres, espéces & leurs variétés (in French). Volume 1. Paris: Jean-Baptiste Bauche. pp. 28, 310.
  4. ^ Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-list of Birds of the World. Volume 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 323.
  5. ^ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 30. ISBN 978-1-4081-2501-4.
  6. ^ Olson, Storrs (1988). "Variation in the procoracoid foramen in the Accipitridae" (PDF). Riv. Ital. Orn. 57 (3–4): 161–164. Retrieved 18 June 2016.
  7. ^ Boyd, John. "Afroaves", Taxonomy in Flux Checklist
  8. ^ Boyd cites the following sources for the embedding of Circus: Kocum (2006), Griffiths et al. (2007), Lerner et al. (2008), and Nagy and Tökölyi (2014)
  9. ^ His species-level arrangement is based on: Wink and Sauer-Gürth (2004), Breman et al. (2013), Barrowclough et al. (2014), Nagy and Tökölyi (2014) and Kocum (2006)
  10. ^ a b Gill, Frank; Donsker, David, eds. (2019). "New World vultures, Secretarybird, kites, hawks, eagles". World Bird List Version 9.1. International Ornithologists' Union. Retrieved 2 April 2019.
  11. ^ BirdLife International (2012). "Accipiter superciliosus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  12. ^ BirdLife International (2012). "Accipiter collaris". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  13. ^ BirdLife International (2012). "Accipiter trivirgatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  14. ^ BirdLife International (2012). "Accipiter griseiceps". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  15. ^ BirdLife International (2012). "Accipiter poliogaster". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  16. ^ BirdLife International (2014). "Accipiter toussenelii". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 28 August 2014.
  17. ^ "African Goshawk Accipiter tachiro". Birdlife International. Retrieved 31 October 2016.
  18. ^ BirdLife International (2012). "Accipiter castanilius". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  19. ^ BirdLife International (2012). "Accipiter badius". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  20. ^ BirdLife International (2012). "Accipiter butleri". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  21. ^ BirdLife International (2013). "Accipiter brevipes". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  22. ^ BirdLife International (2012). "Accipiter soloensis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  23. ^ BirdLife International (2012). "Accipiter francesiae". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  24. ^ BirdLife International (2012). "Accipiter trinotatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  25. ^ BirdLife International (2014). "Accipiter novaehollandiae". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 28 August 2014.
  26. ^ BirdLife International (2014). "Accipiter hiogaster". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 29 August 2014.
  27. ^ BirdLife International (2012). "Accipiter fasciatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  28. ^ BirdLife International (2012). "Accipiter melanochlamys". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  29. ^ BirdLife International (2012). "Accipiter albogularis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  30. ^ BirdLife International (2012). "Accipiter haplochrous". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  31. ^ BirdLife International (2012). "Accipiter rufitorques". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  32. ^ BirdLife International (2012). "Accipiter henicogrammus". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 28 August 2014.
  33. ^ BirdLife International (2012). "Accipiter luteoschistaceus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  34. ^ BirdLife International (2012). "Accipiter imitator". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  35. ^ BirdLife International (2012). "Accipiter poliocephalus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  36. ^ BirdLife International (2012). "Accipiter princeps". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  37. ^ BirdLife International (2012). "Accipiter erythropus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  38. ^ "Little Sparrowhawk Accipiter minullus (Daudin, 1800)". Avibase. Deni Lepage. Retrieved 24 October 2016.
  39. ^ "Accipiter minullus (Little Sparrowhawk)". The IUCN red List of Threatened Species. International Union for Conservation of Nature and Natural Resources. 22695581. Retrieved 24 October 2016.
  40. ^ BirdLife International (2012). "Accipiter gularis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  41. ^ BirdLife International (2012). "Accipiter virgatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  42. ^ BirdLife International (2012). "Accipiter nanus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  43. ^ BirdLife International (2014). "Accipiter erythrauchen". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 28 August 2014.
  44. ^ BirdLife International (2012). "Accipiter cirrocephalus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  45. ^ BirdLife International (2012). "Accipiter brachyurus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  46. ^ BirdLife International (2012). "Accipiter rhodogaster". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  47. ^ BirdLife International (2012). "Accipiter madagascariensis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.CS1 maint: uses authors parameter (link)
  48. ^ "Accipiter ovampensis". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources. Retrieved 31 October 2016.
  49. ^ BirdLife International (2013). "Accipiter nisus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  50. ^ BirdLife International (2012). "Accipiter rufiventris". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature.
  51. ^ BirdLife International (2012). "Accipiter striatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  52. ^ BirdLife International (2012). "Accipiter cooperii". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.CS1 maint: uses authors parameter (link)
  53. ^ BirdLife International (2012). "Accipiter gundlachi". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  54. ^ BirdLife International (2012). "Accipiter bicolor". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  55. ^ BirdLife International (2012). "Accipiter melanoleucus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  56. ^ BirdLife International (2012). "Accipiter henstii". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  57. ^ BirdLife International (2013). "Accipiter gentilis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  58. ^ BirdLife International (2012). "Accipiter meyerianus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  59. ^ a b Balouet, J.C.; Olson, Storrs L. (1989). "Fossil birds from Late Quaternary deposits in New Caledonia" (PDF). Smithsonian Contributions to Zoology. 469: 6–7. doi:10.5479/si.00810282.469.

Further reading[edit]

  • Balete, Danilo S.; Tabaranza, Blas R. Jr. & Heaney, Lawrence R. (2006): An Annotated Checklist of the Birds of Camiguin Island, Philippines. Fieldiana Zool. New Series 106: 58–72. DOI:10.3158/0015-0754(2006)106[58:AACOTB]2.0.CO;2 HTML abstract
  • Heaney, Lawrence R. & Tabaranza, Blas R. Jr. (2006): Mammal and Land Bird Studies on Camiguin Island, Philippines: Background and Conservation Priorities. Fieldiana Zool. New Series 106: 1-13. DOI:10.3158/0015-0754(2006)106[1:MALBSO]2.0.CO;2 HTML abstract
  • Olson, Storrs L. (2006): Reflections on the systematics of Accipiter and the genus for Falco superciliosus Linnaeus. Bull. B.O.C. 126: 69-70. PDF fulltext. Archived copy.

External links[edit]