作者: Patrick R Godin , David E Joyner
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摘要: This study, conducted near Cambridge, Ontario, associated selected characteristics of ponds with pond use by Mallard Anas platyrhynchos from April through September 1977-78. Use pairs was positively related to size; however, the spacing on suggested that probably regulated behavioural mechanisms. broods frequented some surface cover; abundance food appeared less important. Post-breeding used supporting an abundant and accessible variety plant foods. Autumn pre-migratory numerous loafing sites close grain fields.