COBirders,
This is off topic, but...
I wanted to let you know about a new field guide, The Stokes Field Guide
to the Birds of North America that I have recently checked out.  The
usual disclaimer, I have no financial involvement with the authors, the
publisher, or anyone else.  
I like this field guide for a number of reasons, especially because it
uses >3,400 photographs of 854 species that allow the reader to get a
feel for feather wear, gizz, etc, the authors using from 2 to 11 (Lesser
Black-backed Gull, e.g.) photos to show different ages and subspecies;
recognizable subspecies are shown so an observer/photographer might be
able evaluate if the Red Rocks Curve-billed Thrasher is the expected
spotted subspecies, oberholseri, or the gray-breasted palmeri with the
indistinct spots from AZ.  If you like rarities, and who doesn't, there
are five photos of Great Frigatebird (ABA Code-5) and four for Lesser
Frigatebird (ABA Code-5) and lots of photographs of birds of different
ages in flight, great for Cave Swallow I.D. 
Even though the range maps are tiny, they have been recently updated by
Paul Lehman.  The ABA rarity codes, (1-6) are given for each species, and
there is a CD of some, but not enough, bird vocalizations included.  The
recent splits are also included, although they missed the corrected Black
Scoter name (misnamed as Common Scoter) for the North American species. 
It is a heavy field guide with 792 pages, but for me, more information is
better than weight considerations, and that is what I like best about the
book, tons of factoids.  The Stokes’ also continue the recent trend of
placing certain subspecies of birds into groups, a group being somewhere
between a subspecies and a species, e.g. Savannah Sparrow is divided into
five groups (but see the ABA website www.aba.org for the recent Jim
Rising article in Birding proposing Savannah Sparrow should be split into
four species), Song Sparrow is divided into six groups, and Hairy
Woodpecker is divided into four groups. You already know about the Fox
Sparrow groups.
The authors use a ratio approach for I.D. that I don't like...but, if you
are in a bookstore you may want to check it out. 
Bill Maynard
Colorado Springs
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