• Bibekanand Sarkar
• Tasarrun Nazreen

Climate change and its impact on animals are well documented and related studies are being organized mostly around the hot-spots and conserved areas. The studies related to the abiotic factors on birds in the river Koshi is scarce. The river Koshi is famous for its mega-fan and dynamism in flow patterns in Bihar. In the present study, sensitivity to climatic fluctuations like weather events. Documentation on roosting behaviour in relation to the population size, roosting occupancy, roost gathering and rate of arrival on specific site in both winter and summer season. the bad weather lowered the number of flock size of roosters, and when compared with other variables have explicit significant effects and impulse the change of roosting site during postponed and extreme winter invents. A proportionate change was also observed with rainfall and summer months too. This suggests that prolonged cold waves in winter depress the Cattle Egret population while rainfall and humidity have shown moderate effect. Our results are alarming, the future alteration in climatic conditions may change the collective behaviour of the native as well as migratory birds in particular and an add space for invasive species in general.

Cattle egret, climate change, river Koshi, roosting

"Impact of climate change on seasonal aggregation of Cattle Egret (Bubulcus ibis) in Koshi region of Bihar", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 12, page no.h613-h616, December-2024, Available :http://www.jetir.org/papers/JETIR2412772.pdf

"Impact of climate change on seasonal aggregation of Cattle Egret (Bubulcus ibis) in Koshi region of Bihar", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 12, page no. pph613-h616, December-2024, Available at : http://www.jetir.org/papers/JETIR2412772.pdf