Abstract: From 22 May to 11 June 1999 in the Xinjiang Province of the Peoples Republic of China,the incubating behaviour of two female houbaras with the help of a temperature logger egg was successfully monitored.As a rule,the female showed a bimodal daily activity pattern (morning and evening) during the incubation stage.In average,a female will leave her nest 3 to 9 times every day for periods ranging from 8 to 26 minutes.During incubation,the female spent (94±2)% of her daily time in the nest.The average temperature of the egg varied from 31.9 ℃ to 36.5 ℃ while the female attended the nest; that dropped to (24.9±3.2) ℃ while the female left and unattended the nest.The average daily egg temperature increased from 31.9 ℃ to 36.2 ℃ as the incubation advanced,following the increase in air temperature.