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Difference between revisions of "Gray-lined Hawk" - BirdForum Opus

(Imp sizes. C/right. Juvenile flight image. References updated)
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[[Image:Grey-lined_Hawk.jpg|thumb|450px|right|Subspecies ''blakei''<br />Photo &copy; by {{user|Glen+Tepke|Glen Tepke}}<br />Old Gamboa Road, [[Panama]], January 2004]]
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[[Image:B9A18DCC-3513-4B6B-AABA-B94B2445531D.jpeg|thumb|550px|right|Subspecies ''nitidus''<br />Photo &copy; by {{user|rka|rka}}<br />Kernaham, [[Trinidad]], October 2018]]
 
;[[:Category:Buteo|Buteo]] nitidus
 
;[[:Category:Buteo|Buteo]] nitidus
 
==Identification==
 
==Identification==
 +
[[Image:21556IMG 0939bf.jpg|thumb|300px|right|Immature subspecies ''blakei''<br />Photo &copy; by {{user|luis+jelenszky|luis jelenszky}}<br />La Mesa, [[Panama]], September 2005]]
 
38–46 cm (15-18 in)<br />
 
38–46 cm (15-18 in)<br />
Adults are generally easily recognized by the gray-and-white barred underparts and broadly white-banded black tail except in [[Costa Rica]] where [[Gray Hawk]] may be adjacent or overlapping in range.
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Adults
 +
*Gray and white barred underparts
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*Broadly white-banded black tail
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====Similar Species====
 +
Very similar to [[Gray Hawk]] and their ranges may be adjacent or overlapping in [[Costa Rica]].
  
 
==Distribution==
 
==Distribution==
[[Image:21556IMG 0939bf.jpg|thumb|300px|right|Immature<br />Photo &copy; by {{user|luis+jelenszky|luis jelenszky}}<br />La Mesa, [[Panama]], September 2005]]
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From southwest-most [[Costa Rica]], through [[Panama]] and most of lowland North and Central [[South America]], as far south as South West [[Ecuador]] on the Pacific coast and North [[Argentina]] east of the Andes.  
From southwest-most [[Costa Rica]], through [[Panama]] and most of lowland N. and C. [[South America]], as far south as SW [[Ecuador]] on the Pacific coast and N. [[Argentina]] east of the Andes. <br />
 
 
 
 
==Taxonomy==
 
==Taxonomy==
 
[[Gray Hawk]], ''Buteo plagiatus'', was formerly considered [[Dictionary_A-C#C|conspecific]] with this species. The common name for the species was Gray Hawk then.
 
[[Gray Hawk]], ''Buteo plagiatus'', was formerly considered [[Dictionary_A-C#C|conspecific]] with this species. The common name for the species was Gray Hawk then.
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Formerly placed in the monotypic genus ''[[:Category:Asturina|Asturina]]''. Riesing ''et al.'' (2003) presented genetic data indicating that ''Asturina'' is nested within ''Buteo''. This reclassification is supported by virtually all authorities since then: Banks et al. (2006), AOU (2006 supplement), Clements (2007), SACC (2006). The Opus follows in this consensus.
 
Formerly placed in the monotypic genus ''[[:Category:Asturina|Asturina]]''. Riesing ''et al.'' (2003) presented genetic data indicating that ''Asturina'' is nested within ''Buteo''. This reclassification is supported by virtually all authorities since then: Banks et al. (2006), AOU (2006 supplement), Clements (2007), SACC (2006). The Opus follows in this consensus.
 
====Subspecies====
 
====Subspecies====
[[Image:46CDE9A4-8DA9-469B-B417-C4F243423A65.jpeg|thumb|350px|right|Juvenile<br />Photo &copy; by {{user|rka|rka}}<br />Aranguez, [[Trinidad]], October 2018]]
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[[Image:46CDE9A4-8DA9-469B-B417-C4F243423A65.jpeg|thumb|350px|right|Juvenile, subspecies ''nitidus''<br />Photo &copy; by {{user|rka|rka}}<br />Aranguez, [[Trinidad]], October 2018]]
 
There are 3 subspecies<sup>[[#References|[1]]]</sup>:
 
There are 3 subspecies<sup>[[#References|[1]]]</sup>:
*''B. n. blakei'' (formerly ''costaricensis'') from southwest [[Costa Rica]] to northern [[Colombia]] and western [[Ecuador]]
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*''B. n. blakei'' (formerly ''costaricensis''):
*''B. n. nitidus'' from eastern [[Colombia]] and [[Ecuador]] to the [[Guianas]] and Amazonian [[Brazil]]
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:*southwest [[Costa Rica]] to northern [[Colombia]] and western [[Ecuador]]
*''B. n. pallidus'' south-central [[Brazil]] to eastern [[Bolivia]], [[Paraguay]] and northern [[Argentina]]
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*''B. n. nitidus'':
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:*eastern [[Colombia]] and [[Ecuador]] to the [[Guianas]] and Amazonian [[Brazil]]
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*''B. n. pallidus'':
 +
:*south-central [[Brazil]] to eastern [[Bolivia]], [[Paraguay]] and northern [[Argentina]]
  
 
==Habitat==
 
==Habitat==
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[[Image:Grey-lined_Hawk.jpg|thumb|300px|right|Subspecies ''blakei''<br />Photo &copy; by {{user|Glen+Tepke|Glen Tepke}}<br />Old Gamboa Road, [[Panama]], January 2004]]
 
Woodland and forest, but sometimes in more open habitats with scattered trees. Mainly in lowlands, but locally up to 1800 m (5900 ft). Generally fairly common, but rarer in its limited US range.
 
Woodland and forest, but sometimes in more open habitats with scattered trees. Mainly in lowlands, but locally up to 1800 m (5900 ft). Generally fairly common, but rarer in its limited US range.
  
 
==Behavior==
 
==Behavior==
 +
 
====Diet====
 
====Diet====
 
Feeds on a wide range of small animals, mostly reptiles, but also birds, rodents and insects.
 
Feeds on a wide range of small animals, mostly reptiles, but also birds, rodents and insects.
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==External Links==
 
==External Links==
{{GSearch|Buteo+nitid}}
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{{GSearch|"Buteo nitid" {{!}} "Gray-lined Hawk"}}
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{{GS-checked}}1
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<br />
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<br />
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[[Category:Birds]][[Category:Buteo]]
 
[[Category:Birds]][[Category:Buteo]]

Latest revision as of 19:30, 25 October 2024

Subspecies nitidus
Photo © by rka
Kernaham, Trinidad, October 2018
Buteo nitidus

Identification

Immature subspecies blakei
Photo © by luis jelenszky
La Mesa, Panama, September 2005

38–46 cm (15-18 in)
Adults

  • Gray and white barred underparts
  • Broadly white-banded black tail

Similar Species

Very similar to Gray Hawk and their ranges may be adjacent or overlapping in Costa Rica.

Distribution

From southwest-most Costa Rica, through Panama and most of lowland North and Central South America, as far south as South West Ecuador on the Pacific coast and North Argentina east of the Andes.

Taxonomy

Gray Hawk, Buteo plagiatus, was formerly considered conspecific with this species. The common name for the species was Gray Hawk then.

Asturina vs. Buteo

Formerly placed in the monotypic genus Asturina. Riesing et al. (2003) presented genetic data indicating that Asturina is nested within Buteo. This reclassification is supported by virtually all authorities since then: Banks et al. (2006), AOU (2006 supplement), Clements (2007), SACC (2006). The Opus follows in this consensus.

Subspecies

Juvenile, subspecies nitidus
Photo © by rka
Aranguez, Trinidad, October 2018

There are 3 subspecies[1]:

  • B. n. blakei (formerly costaricensis):
  • B. n. nitidus:
  • B. n. pallidus:

Habitat

Subspecies blakei
Photo © by Glen Tepke
Old Gamboa Road, Panama, January 2004

Woodland and forest, but sometimes in more open habitats with scattered trees. Mainly in lowlands, but locally up to 1800 m (5900 ft). Generally fairly common, but rarer in its limited US range.

Behavior

Diet

Feeds on a wide range of small animals, mostly reptiles, but also birds, rodents and insects.

References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2018. The eBird/Clements checklist of birds of the world: v2018. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F and D Donsker (Eds). 2012. IOC World Bird Names (version 3.2). Available at http://www.worldbirdnames.org/.
  3. Birdforum thread discussing the taxonomy of Gray Hawk
  4. Birdforum thread discussing AOU proposals including one to split Gray Hawk in two parts
  5. Paper describing the differences between Gray Hawk and Gray-lined Hawk

Recommended Citation

External Links

GSearch checked for 2020 platform.1

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