Assertion: hawk's tail | /r/CapableOf | weigh estimated 657 g
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text: In one instance, a red-tailed hawk failed to kill a healthy drake red-breasted merganser (Mergus serrator), with this duck estimated to weigh 1,100 g (2.4 lb), later the same red-tail was able to dispatch a malnourished red-necked grebe (Podiceps grisegena) (a species usually about as heavy as the merganser), weighing an estimated 657 g (1.448 lb).