Birth behavior of Gayal(or Minthun,Bos frontalis) cow was directly observed in semi-wild management farm in Lushui County,Yunnan.Thirteen out of 17 females left their herd 11.23 ± 7.14 d in average before they gave birth to look suitable birth site.Usually the birth sites were relatively flat at higher position near creek or rive with abundant food and sunshine.The mothers and their calves rejoined the herd a 5.57 ± 2.64 d later after birth.Females(n=6) made more watchful walking 24 to 12 hour before gave birth,they showed impatience and mounting behaviors 12 to 5 hour before birth.From 3 to 1 hour before birth,females cleared the birth sites.Six cows gave birth in the duration from 7 am to 6 pm,but 4 of 6 cow produced calf from 6 to 7 o'clock in the morning.Cows got up and lay down(7.00 ± 6.00 times in average) during thedelivery course.It took 25.00 ± 5.00 min for the cows delivered their calves completely.Placenta was expelled 5.60 ± 1.80 h later after the calve was born.The birth weight was 16.46 ± 2.56 kg(n=6,♂ 1 + ♀5) and cow clicked,lactated and looked calf.It took 52.70 ± 29.69 min for new born calf to stand up,and then took 38.7 ± 29.14 min to suck milk and 61.33 ± 1.53 min later to be able walking.