Big Bird is once again turning 6 once again on March 20th.  All around there will be special local celebration for the big yellow bird that has been around for more than 40 years but still stays a very young and vibrant 6 year-old.   Busch Gardens Tampa Bay’s will be celebrating Big Bird’s birthday on March 19th.   Guests to the park have to purchase separate tickets for the birthday party celebration.   The birthday party will take place in the Sesame Street Safari of Fun that opened at the Busch Gardens Tampa Bay last year.