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Barred Owl

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Old Thursday 7th July 2011, 16:28   #1
Richard Klim
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Barred Owl

Barrowclough, Groth, Odom & Lai 2011. Phylogeography of the Barred Owl (Strix varia): species limits, multiple refugia, and range expansion. Auk: in press. [abstract]
"S. v. sartorii of Mexico was separated from the remaining taxa of S. varia by S. fulvescens of Central America. Consequently, the Barred Owls of Mexico are a species-level taxon."
  • Holt et al 1999 (HBW 5).

  • Mazur & James 2000. Barred Owl (Strix varia). BNA Online 508.
    "S. v. sartorii (Ridgway, 1873): Scarce (infrequently reported) resident of Mexico along montane Pacific slope (Durango south to Guerrero) and interior montane areas along Atlantic slope from Puebla, Veracruz, and Oaxaca (Peters 1940, Howell and Webb 1995). Toes feathered basally as nominate varia, but coloration darker, with stripes on underparts black to blackish brown and markings on upperparts more numerous and whiter; larger than nominate varia, with relatively larger bill and feet (see measurements in Ridgway 1914)."

  • Steve Howell, 2009: ""Obvious" and "new" species now (if not when I wrote the Mexico guide) include... the Mexican population of Barred Owl (whose voice I finally recorded this year),..."

Last edited by Richard Klim : Thursday 7th July 2011 at 20:47.
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Old Friday 8th July 2011, 11:25   #2
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Steve Howells assertion about voice being important to night birds seems so obvious that it makes me wonder why so many taxa of night birds ( owls and nightjars ) are "lumped" together when , vocally, they seem to be poles apart. Perhaps it's just a consequence of 'birding' being mainly a visual thing ( except at night and in thick forest and................ ).

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Old Friday 8th July 2011, 13:44   #3
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Quote:
Originally Posted by chris butterworth View Post
Steve Howells assertion about voice being important to night birds seems so obvious that it makes me wonder why so many taxa of night birds ( owls and nightjars ) are "lumped" together when , vocally, they seem to be poles apart. Perhaps it's just a consequence of 'birding' being mainly a visual thing ( except at night and in thick forest and................ ).

chris
I think it to a large extent is a result of:
1 it is difficult to listen to the voice of a study skin in a museum
2 field worthy recording equipment being fairly recent and online repositories of sound recordings being even more recent. And if you record a sound at night, can you prove which animal made that sound?

But to return to the observation by Howell: the same is said quite strongly in Koenig's Owl book, and he combines it with the observation that voice in owls seems to be genetically determined without much in the way of learning.

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Old Friday 8th July 2011, 20:01   #4
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Hi All,

This is an interesting and not too surprising conclusion. I'm curious to know how close the sartorii birds are to Fulvous Owl compared with non-Mexican forms of Barred Owl. My reason for wondering relates to fairly recent field work carried out in central Oaxaca, Mexico (within the range of sartorii Barred Owls). Until quite recently, the voice of this population was undescribed (having been heard by a few birders, but not recorded). I've not heard Steve Howell's recording, but Rich Hoyer did some playback in central Oaxaca using Fulvous Owl and had an owl fly in and give vocalizations consistent with Fulvous Owl (some 200+ miles west of the known range of Fulvous Owl). His recording is published on Xeno-Canto (XC46405). It is remarkably similar to Jesse Fagan's Fulvous Owl recording XC42718 from Antigua, Guatemala, similar to other Fulvous Owl recordings, and unlike Barred Owl recordings elsewhere. So the obvious question would be, is sartorii a distinct species or is it a subspecies of Fulvous Owl rather than Barred Owl?

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Old Friday 9th September 2011, 18:43   #5
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Mexican Barred Owl

Strix sartorii provisionally accepted for IOC World Bird List v2.10.
www.worldbirdnames.org/updates-spp.html
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Old Saturday 10th September 2011, 21:14   #6
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Mexican Barred Owl

Quote:
Originally Posted by Richard Klim View Post
Strix sartorii provisionally accepted for IOC World Bird List v2.10.
www.worldbirdnames.org/updates-spp.html
Boyd's Taxonomy in Flux, September 10:
...Mexican Barred Owl, Ciccaba sartorii has been split from Northern Barred Owl, Ciccaba varia...
http://jboyd.net/Taxo/changes.html
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Old Thursday 19th April 2012, 19:33   #7
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Odom & Mennill

Odom & Mennill (in press). Inconsistent geographic variation in the calls and duets of Barred Owls across an area of genetic introgression. Auk. [abstract]
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Old Tuesday 9th June 2015, 07:38   #8
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Mexican Barred Owl

Quote:
Originally Posted by Richard Klim View Post
Barrowclough, Groth, Odom & Lai 2011. Phylogeography of the Barred Owl (Strix varia): species limits, multiple refugia, and range expansion. Auk: in press.
Barrowclough et al 2011. Auk 128(4): 696-706. [abstract] [pdf]

Nathan Pieplow & Andrew Spencer, Earbirding.com, 7 Jun 2015: Mexico's Mystery Owl.

[See also: Barred Owl - proposed split.]
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Old Friday 12th June 2015, 18:25   #9
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Cinereous Owl

Quote:
Originally Posted by Richard Klim View Post
Nathan Pieplow & Andrew Spencer, Earbirding.com, 7 Jun 2015: Mexico's Mystery Owl.
IOC World Bird List v5.3 (Draft).
www.worldbirdnames.org/updates/update-diary/
www.worldbirdnames.org/updates/english-names/
Quote:
2015 June 12: Change English name of Strix sartorii to Cinereous Owl
"Change the English name of Strix sartorii to Cinerous Owl (from Mexican Barred Owl) because: (1) It is not closest to (Northern) Barred Owl (by voice or genetics), and using Mexican Barred Owl suggests it is, and requires needlessly modifying "The" Barred Owl to Northern Barred Owl. (2) As English names, Northern Barred Owl and Mexican Barred Owl are easily mis-associated with Northern Spotted Owl and Mexican Spotted Owl, 2 subspecies that are commonly given these English names, which could be confusing, not to mention wrongly reinforcing the misperception the 2 "Barred Owls" are similarly closely related. (3) Cinereous refers to the distinctive gray plumage tones, akin to its closest relative Fulvous Owl. Thus the North American species (north of Mexico) can be kept as Spotted and Barred (plumage patterns), whereas the southern taxa can be Fulvous and Cinereous (plumage tones). This seems like a pleasing symmetry, makes sense, and is the path of least resistance, before people start commonly using Northern Barred Owl" (S. Howell 6/12/2015)
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Old Friday 12th June 2015, 19:23   #10
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How eminently sensible. . ..
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Old Thursday 13th August 2015, 14:21   #11
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Cinereous Owl

Quote:
Originally Posted by Richard Klim View Post
Nathan Pieplow & Andrew Spencer, Earbirding.com, 7 Jun 2015: Mexico's Mystery Owl.
Forthcoming...

Pieplow & Spencer 2015. Finding Mexico's mystery owl—Cinereous Owl Strix (varia?) sartorii. Neotrop Birding 17: 34–39.

[With thanks to Chris Sharpe for reporting on NEOORN.]

PS. Holt et al 2015 (HBW Alive).

Last edited by Richard Klim : Thursday 13th August 2015 at 14:52.
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