Rockville Hills Regional Park participates in the California Wood Duck Program. Nest boxes provided for wood ducks have helped increase their waning population. In 2017, Rockville had 10 nesting boxes with a total of 40 ducklings. The boxes are built and monitored by volunteers.
Female on the left and male on the right. The male Wood Ducks are probably the most colorful ducks in this area.
Wood Ducks in a tree. If you can't locate the female, see the photo below.