Waterhen may refer to: Common moorhen or common waterhen, a bird species in the rail family Amaurornis rails, a genus of birds in the rail family Various other birds of the family Rallidae (rails) may be informally called waterhens Waterhen Indian Reserve No. 45, Northern Affairs Community in the Canadian province of Manitoba Waterhen River (disambiguation), more than one river in Canada HMAS Waterhen, one ship and one shore establishment in the Royal Australian Navy