I do not know anything about you Patricia, but in case you're unaware, 
according to my 1996 Yellow Book the earliest arrival date for Yellow 
Warbler in Maryland when it was written was April 3, and the earliest 
now on eBird is March 27 (the only March record on eBird for Maryland). 
So this would be a record early date for Yellow Warbler. I'll note that 
Pine Warblers, some individuals of which can be extremely yellow but 
have wing bars, are beginning to migrate now.  Pine Warblers also 
frequently show up at feeders.

Regarding your question, bar charts on both eBird in the Yellow Book 
suggest that Dark-eyed Juncos (Slate-colored is now the subspecies name) 
start migrating around April 1, and should be mostly gone by the end of 
the month. White-throated Sparrows start migrating around May 1, and 
should be mostly gone by the end of the month.

Good birding!
Jim Moore
Rockville, Maryland
PLEASE REPORT YOUR BIRD SIGHTINGS to http://ebird.org/

Patricia Rose wrote:
> A male yellow warbler visited my flat feeder three times today. He was 
> hanging out with the chipping sparrows and cardinals.  Spring is here 
> and the bluebirds and house sparrows are checking out available 
> housing in my yard.
> Also when do the white throated sparrows and slated juncos normaly 
> migrate?
> Please respond at:
>
> 
>
> Patricia Viola Rose
> 240-256-5423 cell
>