Specifically the comments of Dave Kidwell & Mark Hoffman --- well said.

This is a 'species' that somewhere along the lines of either one 
species splitting into two or is already further along that path. 
Studies like this will further our knowledge of Sycamore and 
Yellow-throated Warblers and enable us to work to both.  I had an 
electronic conversation with Bailey McKay yesterday, discussing his 
work and work in 'a long time ago in a galaxy far away' past at 
William & Mary.  This is important work and cannot wait to read the 
papers that will come out of this.  I am sure everyone on Osprey will 
be also anxious to read them also.
-- 
Good Birding

A former Maryland Birdwatcher, now An Iowa Birdwatcher

Rick Hollis

North Liberty, IA
http://iowabirdwatcher.blogspot.com/