Even, there are plenty of city buses going to Srirangapatna from Mysore (Bus No:307, I think) which passes through Ranganatittu entrance and the bird sanctuary is about 800 meters from this spot. Whenever I go to Mysore as a tourist, I always visit this place. Very nice place. I buy a daily pass for Rs.50/- and cover almost all places like Chamundi Hills, Zoo, KRS, Ranganatittu, Srirangapatna and Mysore palace.