Drat! :C Don't you have something better to do -- like edit Opus -- than capture my old posts just before I edit them!
Cheers,
Jim
Hahaha :-O
I decided to take a nice little coffee break from the Opus - maybe a leisurely stroll through the ID forum...
It's like chess, Jim. The second you take your hand off that piece... 8-P
Oh man! SUCH a good topic! After delving extensively into resources, I am (*GASP*) jumping back up onto the fence (of course, inadvertently faking out Jim; EDIT: Who I now see is with me on the fence)! In fact, in line with Larry's comment, I'm not sure we can nail down this one definitively!
* Sibley states that some juveniles of these two species show extreme similarity from July through October.
Indeed he does. Notice how that note is specifically accompanying side-by-side close-ups of lores - it's not directly discussed to what degree leg color can overlap. In my initial post, I believed this individual's legs too be far enough on the yellow side to definitively say Snowy. However, after looking through many photos of young Little Blues - the
great majority of which display unquestionably greenish (howabout that for an oxymoron? "unquestionably greenISH"

) legs - I've found some Little Blues with exceptionally yellow legs:
http://www.birdforum.net/gallery/showphoto.php?photo=181093
http://www.birdforum.net/gallery/showphoto.php?photo=152037
http://www.birdforum.net/gallery/showphoto.php?photo=4811
Because of these photos, I join Larry's "go-either-way" camp. No field marks seen can definitely point to either species.
On an additional note, I found an interesting quote in Howell & Webb (Mexico & Northern Central America) regarding Little Blue juvie plumage:
Juv/1st basic:
legs and feet greenish yellow. Plumage entirely white except for dusky tips to outer 6-8 primaries...
Emphasis is mine.
Now I can't see these "dusky tips" in photo2, but frankly, that's the first I've heard of this ID marker, I couldn't find any photos which show this, and I can't speak to whether or not this refers only to Mexican populations.
"Not cut-and-dry" indeed!
