The time required to do this is referred to as the synodic period of revolution, as opposed to the sidereal period of revolution, which is the time required for a planet to move once around the Sun relative to the stars and is equal to the orbital period.
Mandarin ducks demand very specific breeding sites preferring to nest near water and, ideally, with the nest box accessed from the water, ie: facing a pond or lake, and raised on a platform a metre or more above ground level, reached by a ramp. secure enclosure is essential to keep the Mandarin ducks in and keep out potential predators such as foxes, hawks, crows, and domestic cats and dogs. Pairs usually are allowed a 2m x 2m pen, preferably with a small pond.
The female Mandarin Duck is a lot like the female Wood Duck, but she is lighter and has more gray on her body. She has with a white eye ring, with the tail of the ring tapering off towards her neck.Her breast and sides are buff and gray with white spots. Her under parts are white.andarin Ducks will form small flocks in the winter; however, they generally stay in breeding pairs. They do not usually associate with other ducks except Wood Ducks. The showy crest is raised when the male is agitated or during display.