Yeah, they can fly enough upward to get into low branches to roost but I can imagine they wouldn't do so well flying down from great heights, gravity being more than they could overcome with wing strength. Anyway, picturing the scene, as gruesome as it is, was damn funny. Especially, the Hindenburg reference.
You can lead a horse to water. But you can't make him get down on one knee and do an Al Jolson impression!