One Bald Eagle is as heavy as: four American Crows, two Barn Owls, eight American Goldfinches, two Saw-whet Owls, three Barn Swallows, two American Robins, seven House Wrens, two American Kestrels, five Ruby-throated Hummingbirds, four Northern Cardinals, two Belted Kingfishers, two Red-winged Blackbirds, or 9 pounds, plus or minus several Saw-whet Owls.