Altho probably extinct in United States, some may wander back from South America. In 1896 I saw five flying over the Everglades near the headwaters of the Miami River. Those who have seen living birds say they have a rolling call; that curiosity usually conquers timidity and fruit, tree buds and seeds (especially thistle) are their principal food.
They are gregarious, retiring for the night into a hollow tree. One enterprising individual I knew, saw a flock go into one of these retreats and captured the lot, about 30 birds, by covering the opening with fish net.
A few still may exist in extreme southern Florida.