LUCKNOW, May 17 -- Tiger reserves in the state are also on alert after the death of two big cats afflicted with bird flu. Though open for visitors, tiger reserves and wildlife sanctuaries have instructed their staff to watch out for abnormal behaviour among wild animals. "Tiger reserves hardly get the impact of bird flu as wild animals here are far from human contact or reach. But we have instructed our staff to remain alert and watch out for any sign or suspicion," said Dudhwa Tiger Reserve director H Rajamohan. Asked what is the infection threat if domestic animals or birds do not enter the tiger reserve, Rajamohan replied, "The focus is on local migratory birds such as stork." The staff in reserves have been divided for separate zones - core, buffer and outer. In each zone, staff and veterinarians have been tasked with watching and reporting any sign of bird flu or death of avians....