Summary[edit] Description: English: Male Sunda Teal (aka East Indian Grey Teal) (Anas gibberifrons) - Sylvan Heights Waterfowl Park, Scotland Neck, North Carolina. This is also referred to by some as Anas gibberifrons gibberifrons. Date: 20 April 2012. Source: Own work. Author: DickDaniels (http://carolinabirds.org/).