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Paper Details

Diurnal Time Budget and Activity Pattern of Indian Sarus Crane (Grus Antigone Antigone) in Chittaurgarh District, Southern Rajasthan, India

Mohammed Yaseen*, Rashmi Saxena1, Sunil Dubey2 and Neha Dashora3

Journal Title:Journal of Chemical, Biological and physical sciences

The Indian Sarus Crane (Grus antigone antigone) is a globally threatened bird and kept under vulnerable category by IUCN. The time-activity budgets of the Sarus cranes were recorded in Modia Mahadev Dam, in Chittaurgarh District, Southern Rajasthan. Foraging, loafing, standing and miscellaneous activities constituted major part of the time budget throughout the study period (daily, monthly and annually). Most of the activity time was allocated to foraging and loafing throughout the year, except for July and August months when duration of different activities was reduced in order to allocate maximum possible time for nest formation which was more imperative than other routine activities. Standing being comfort behaviour varied significantly over the months. Resting did not vary significantly over the months but showed a relative increase and decrease along with the change in temperature through different seasons. Some occasional observations also revealed that juveniles being physically weaker needed more time for resting. Vigilance was more prominently performed by parents after the hatching of eggs until the attainment of fledging stage of their brood. The well-established pairs showed more tendency towards unison calls and displays compared to the unbounded pairs or unpaired individuals of the flock. Account of activities was not significantly different between male and female Cranes in summerseason (t= 0.28, df= 12, P=0.77), monsoon season (t= 0.00, df= 14, P=0.99) and winter season (t= 0.07, df= 12, P=0.94).