In the autumn of 2011, both the time budget and diurnal rhythm of behavior of black-necked crane (Grus nigricollis) were studied at Altun Mountain National Nature Reserve, Xinjiang, China. The results showed that foraging was the main behavior of cranes in autumn, accounting for 69.07±1.64% of the diurnal time budget, followed by alert (19.38±0.87%), locomotion (5.97±0.49%), maintenance (2.88±0.60%) and other behavior (2.70±0.44%). In addition, we also compared the behaviors of black-necked cranes in different periods and places. The results indicate that the diurnal time budgets of cranes in autumn in breeding area are more like the wintering budget in wintering area than breeding season in breeding area. Cranes changed their diurnal time budget and behavior rhythm to adapt the environmental and social changes.
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