April 2013. For details, see my review
http://www.zoochat.com/22/review-dallas-world-aquarium-350667/ . I am not sure how many of the bird species listed here are pinioned, so in theory some may be free flight in the main space as well. They include Scarlet ibis (definitely free flight), Roseate spoonbill, Black-necked swan, Orinoco goose, White-faced whistling duck, Sharp-winged teal, Ringed teal, White-cheeked pintail, Rosy-billed pochard, and Southern pochard.