Little Traveler

I have been seeing this little bird for about a week, flitting about in the mesquites and palo verdes and the texas sage, always moving too fast or too obscured to see it clearly

finally yesterday I got a clear shot 

it appears to be, according to Roger Tory Peterson, a Yellow-Rumped Warbler in its winter plumage (I had caught sight of its yellow rump another day, but the Magnolia Warbler also has a yellow rump...this pale plumage identifies it)...this desert area is a stop over point for many migrating birds, and I see different ones each spring and fall as the birds move north and south...in 4 and a half years I have seen a solitary Robin only twice...