The data maintained at Livestock Farm, Rajasthan College of Agriculture, Udaipur over a period of 10 years (January 1995 to December 2004) of Gir purebred and crossbred cows were utilized for the present study. The means for DBTI, WBTI, DBTII, WBTII, MAXT, MINT, MAXH, MINH, SSH, RF, THIM, THIE and THIS were 18.11±0.137°C, 15.37±0.120°C, 30.18±0.084°C, 19.59±0.071...