This marshy area is home to Russell's vipers and scorpions, which makes the lives of border soldiers difficult. During the monsoon season between June and September, the creek floods its banks and envelops the low-lying salty mudflats around it. During the winter season, the area is home to flamingoes and other migratory birds. The 24th parallel north passes through Sir Creek. Sir Creek is mainly fed by Nareri Lake, whose outlet joins the creek on its right bank. LBOD, a canal, also discharges water effluents into Sir Creek.