Assertion: throated hummingbird | /r/CapableOf | weigh about 4.5 g
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text: As a result of his experiments with hovering hummingbirds in metabolic chambers, Lasiewski concluded that a male Ruby-throated hummingbird, weighing about 4.5 g, of which 2 g was fat, could fly nonstop for 26 hours, consuming the fat at the rate of 0.69 calories per hour.