Mandarin ducks are often together, symbolizing the feelings of husband and wife. Mandarin ducks are water birds, smaller than ducks. They inhabit on ponds and marshes, and their males and females are often together. It is used to describe husband and wife in folklore and literature; Also used to call something even.

Mandarin ducks are alert, very good at concealment, and have strong flying skills. After a full meal, when returning to the place of residence, a pair of mandarin ducks often hover over the place of residence for reconnaissance. After confirming that there is no danger, they ask the large group to fall down and rest together. If the situation is found, it will send out the alarm sound of "Oh, oh, oh" and quickly escape with the companions.

Source: @elistuder