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|Monday 30th December 2013, 18:38||#1|
Join Date: Feb 2003
Location: Somerset, UK
Whittaker, Aleixo, Whitney, Smith & Klicka 2013. A distinctive new species of gnatcatcher in the Polioptila guianensis complex (Aves: Polioptilidae) from western Amazonian Brazil. HBW SV: 301–305. [supp info]
Whitney & Alvarez Alonso 2005. A new species of gnatcatcher from white-sand forests of northern Amazonian Peru with revision of the Polioptila guianensis complex. Wilson Bull 117(2): 113–210. [abstract]
[See also failed AOU-SACC Proposal #204 (Zimberlin, Feb 2006): Treat Polioptila facilis and Polioptila paraensis as a separate species from P. guianensis.]
Atwood & Lerman 2006 (HBW 11):
Last edited by Richard Klim : Tuesday 31st December 2013 at 09:33. Reason: Proposal #204.
|Wednesday 30th July 2014, 20:53||#3|
Join Date: Oct 2009
Location: Sp. Hrhov
The Rio Negro Gnatcatcher, Polioptila facilis, and Para Gnatcatcher, Polioptila paraensis, are split from the Guianan Gnatcatcher, Polioptila guianensis. Also, the newly described Inambari Gantcatcher, Polioptila attenboroughi, is added to the list. See Whitney and Alonso (2005) and Whittaker et al. (2013). I also took the opportunity to rearrange the gnatcatchers a bit.
|Wednesday 10th September 2014, 16:21||#5|
Join Date: Jul 2004
I wonder if Zimmer's confusion over variation in schistaceigula (Slate-throated Gnatcatcher) in his comment to the SACC proposal stems from not knowing the distinct differences between the sexes. They are claimed to be alike in most literature, but are now known to be different. I guess the very small number of museum specimens was the basis for this confusion.
The dark male with eyering http://www.pbase.com/ahlman/image/151251565 (Ecuador)
The paler female with eyebrow http://www.pbase.com/ahlman/image/140351546 (Ecuador)
http://www.pbase.com/ahlman/image/151251572 (Ecuador, partner of male in earlier photos)
Pair http://1.bp.blogspot.com/_i61d7tcluC...atcatcher1.jpg (Panama)
The differences in darkness between the Ecuador and Panama birds is purely due to light and photo processing. The males and female don't vary much over their range.
The illustration in most field guides is the male, but Handbook of the Birds of the World has a female.
Last edited by Roy'N : Wednesday 10th September 2014 at 16:41.
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