Warbler Guy, what is the new warbler taxonomy? Why is the warbler family rearranged?

Those are great questions, Posey (in Seattle).

The best way for me to explain the answers is to point you to:

http://www.sibleyguides.com/2011/06/the-new-wood-warbler-taxonomy/

Here, you'll learn, for example, that the Parula, Wilsonia, and Dendroica genera have vanished, with their species merging into other genera.

There's also a link to a Q & A interview with Irby Lovette, who is the lead author and researcher that championed the taxonomy changes.