The local humane company is Humane Wildlife Services - # (866) 948-6263, email humaneservices@humanesociety.org. They specialize in professional, long-term resolution of urban wildlife issues. They also guarantee against re-entry.Located in Maryland but will work in DC and Virginia.
Website: www.humanewildlifeservices.com "Humanely solving your wildlife issues...Removal from attics, chimneys, etc., Family reunion, Exclusion, Prevention, etc...."