Habitat use time-budgets (in %) from sunrise to sunset for 16 mallards studied on southern Öland, Sweden, October – December 2010.

Habitat use time-budgets (in %) from sunrise to sunset for 16 mallards studied on southern Öland, Sweden, October – December 2010.针对2010年10月至12月在瑞典南部厄兰岛（Öland）开展的16只绿头鸭的研究，其日出至日落时段的栖息地利用时间预算（Habitat use time-budgets）以百分比计。