In the metro area it congregates in flocks of up to 30 birds to patrol lakesides and riverbanks for its food, but while it enjoys a varied diet of herbs, seeds, fruit, eggs, insects, spiders, crustaceans and molluscs, its main sustenance is derived from the stems of young bulrushes and reeds. Watching a swamphen eat is a comical sight as it awkwardly clasps its food in long-fingered claws designed for walking on floating reeds.


Though tame in spots where people regularly feed waterbirds, in its natural state the swamphen is a shy and secretive bird, skulking in reed beds and only betraying its presence with its loud screeching cries. Swamphens often trample rushes into feeding platforms which can be identified by piles of food scraps, such as marron shells.

In the Perth area the swamphen breeds from mid-July to November – and it's a real family affair.
The entire flock builds a platform of rushes and grass with stems drawn over it to form a canopy, and in this single nest several females lay their sandy-coloured eggs, which are splotched with chestnut and grey.  The flock also constructs a nursery nest in which the chicks are brooded at night and from which they are led to forage by day, usually by adults at the lower end of the pecking order.