Assertion: american crow's family | /r/CapableOf | weigh up to about 40 kg
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text: A prehistoric, flightless family, sometimes called (incorrectly) "giant megapodes" (Sylviornis) of New Caledonia were the most massive galliformes ever, up to 1.7 m (5.6 ft) long and weighing up to about 40 kg (88 lb).