In traditional Chinese culture the mandarin duck is believed to bring lifelong fidelity to couples and frequently used as symbols for wedding presents or in Chinese art. Formerly abundant in their native Far East, numbers of mandarin ducks have declined due to habitat destruction (mainly logging) and over-hunting. For this Living World, presenter Chris Sperring travels to the river Dart in Devon where starting underneath the busy A38 trunk road he meets up with naturalist John Walters who has been studying a winter roost of mandarin ducks here. In mid-winter up to 100 birds can roost here but in early spring they are beginning to pair up and disperse along the river Dart. Leaving this noisy suburban area, Chris and John then head off up the river to search for pairs of these wonderful tree ducks in the Devonian landscape.