Events Loading view. There were no results found. There were no results found. Events Rio Grande Birding Festival Rio Grande Birding Festival (956) 423-5565 registration@rgvbf.org http://www.rgvbf.org. Today Upcoming Upcoming Select date. Previous Events Today Next Events Subscribe to calendar Google Calendar iCalendar Outlook 365 Outlook Live Export .ics file Export Outlook .ics file