Crews will be picking up Christmas trees in Washington this week. The City of Washington Maintenance and Construction Department will collect the trees today through Friday. Trees can be placed at the street corners on the terrace area between the sidewalk and street, but do not block access to fire hydrants or obstruct visibility. Trees can also be placed in the southeast corner of Central Park in the fenced area. People interested in using the trees for animal or aquatic habitat are encouraged to do so.