Mud buffalo (B. bubalis carabanesis) is very suitable to be developed buffalo in North Sumatra, Indonesia . In recent years , the buffalo population has declined each year . One was caused by a lack of knowledge of the biological behavior of farmers in buffalo so do not reproduce as expected . This research aims to determine the behavior of ingestive and wallow of mud buffalo (B. bubalis ... [Show full abstract] carabanesis) in District of Munte , Kabanjahe and Mardingding , Karo Regency. This research was conducted on 6 buffaloes that compose of adult male and female buffalo, young male and female buffalo, male and female calves buffalo in each district . This study used the Zero One 15 minute intervals performed at 09.00 am -04.00 pm. The results showed the highest activity of ingestive and rumination on Kabanjahe and Mardingding i.e 9.23 times and 5.06 times, and the lowest was on Munte District was equal to 8.74 times and 2.67 times . Frequency of Wallowbehavior is highest in Kabanjahe District was equal to 1.40 times / day ,while the lowest was in Munte District and Mardingding District were equal to 1.00 times/day . The highest duration of wallowing in Mardingding District is 30.55 minutes , and the lowest was in Kabanjahe District is 11.57 minutes.